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Dissertations / Theses on the topic 'Security protocol'
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O'Shea, Nicholas. "Verification and validation of security protocol implementations." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4753.
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Security protocols are important and widely used because they enable secure communication to take place over insecure networks. Over the years numerous formal methods have been developed to assist protocol designers by analysing models of these protocols to determine their security properties. Beyond the design stage however, developers rarely employ formal methods when implementing security protocols. This may result in implementation flaws often leading to security breaches. This dissertation contributes to the study of security protocol analysis by advancing the emerging field of implementation analysis. Two tools are presented which together translate between Java and the LySa process calculus. Elyjah translates Java implementations into formal models in LySa. In contrast, Hajyle generates Java implementations from LySa models. These tools and the accompanying LySa verification tool perform rapid static analysis and have been integrated into the Eclipse Development Environment. The speed of the static analysis allows these tools to be used at compile-time without disrupting a developer’s workflow. This allows us to position this work in the domain of practical software tools supporting working developers. As many of these developers may be unfamiliar with modelling security protocols a suite of tools for the LySa process calculus is also provided. These tools are designed to make LySa models easier to understand and manipulate. Additional tools are provided for performance modelling of security protocols. These allow both the designer and the implementor to predict and analyse the overall time taken for a protocol run to complete. Elyjah was among the very first tools to provide a method of translating between implementation and formal model, and the first to use either Java for the implementation language or LySa for the modelling language. To the best of our knowledge, the combination of Elyjah and Hajyle represents the first and so far only system which provides translation from both code to model and back again.
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Dowling, Benjamin James. "Provable security of internet protocols." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/108960/1/Benjamin%20James_Dowling_Thesis.pdf.
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Secure communications over the Internet are typically established by first running an authenticated key exchange protocol, which computes a secret key between two users, which is then utilised in an encryption protocol. In this work we examine novel security properties of the most prominent communications protocols, including the Transport Layer Security and Secure Shell protocols. We introduce new security frameworks for analysing security properties of protocols involving negotiation, multiple ciphersuites, long-term key reuse, and time synchronisation. Our results have increased confidence in the security of real-world protocols, and our analyses of next-generation protocols have informed their development by standardisation bodies.
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Choi, H. J. "Security protocol design by composition." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597633.
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The aim of this research is to present a new methodology for the systematic de sign of compound protocols from their parts. Some security properties can be made accumulative, i.e. can be put together without interfering with one another, by carefully selecting the mechanisms which implement them. Among them are authentication, secrecy and non-repudiation. Based on this observation, a set of accumulative protocol mechanisms called protocol primitives are proposed and their correctness is verified. These protocol primitives are obtained from common mechanisms found in many security protocols such as challenge and response. They have been carefully designed not to interfere with each other. This feature makes them flexible building blocks in the proposed methodology. Equipped with these protocol primitives, a scheme for the systematic construction of a complicated protocol from simple protocol primitives is presented, namely, design by composition. This design scheme allows the combination of several simple protocol parts into a complicated protocol without destroying the security properties established by each independent part. In other words, the composition frame work permits the specification of a complex protocol to be decomposed into the specifications of simpler components, and thus makes the design and verification of the protocol easier to handle. Benefits of this approach are similar to those gained when using a modular approach to software development. The applicability and practicality of the proposed methodology are validated through many design examples of protocols found in many different environments and with various initial assumptions. The method is not aimed to cover all existent design issues, but a reasonable range of protocols is addressed.
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Gibson-Robinson, Thomas. "Analysing layered security protocols." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:35c9e4e5-6540-4e1d-9fcc-a98f8f60c20a.
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Many security protocols are built as the composition of an application-layer protocol and a secure transport protocol, such as TLS. There are many approaches to proving the correctness of such protocols. One popular approach is verification by abstraction, in which the correctness of the application-layer protocol is proven under the assumption that the transport layer satisfies certain properties, such as confidentiality. Following this approach, we adapt the strand spaces model in order to analyse application-layer protocols that depend on an underlying secure transport layer, including unilaterally authenticating secure transport protocols, such as unilateral TLS. Further, we develop proof rules that enable us to prove the correctness of application-layer protocols that use either unilateral or bilateral secure transport protocols. We then illustrate these rules by proving the correctness of WebAuth, a single-sign-on protocol that makes extensive use of unilateral TLS. In this thesis we also present a full proof of the model's soundness. In particular, we prove that, subject to a suitable independence assumption, if there is an attack against the application-layer protocol when layered on top of a particular secure transport protocol, then there is an attack against the abstracted model of the application-layer protocol. In contrast to existing work in this area, the independence assumption consists of eight statically-checkable conditions, meaning that it can be checked statically, rather than having to consider all possible runs of the protocol. Lastly, we extend the model to allow protocols that consist of an arbitrary number of layers to be proven correct. In this case, we prove the correctness of the intermediate layers using the high-level strand spaces model, by abstracting away from the underlying transport-layers. Further, we extend the above soundness results in order to prove that the multi-layer approach is sound. We illustrate the effectiveness of our technique by proving the correctness of a couple of simple multi-layer protocols.
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Modesti, Paolo <1966>. "Verified security protocol modeling and implementation with AnBx." Doctoral thesis, Università Ca' Foscari Venezia, 2012. http://hdl.handle.net/10579/1234.
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AnBx is an extension of the Alice & Bob notation for protocol narrations to serve as a specification language for a purely declarative modelling of distributed protocols. AnBx is built around a set of communication and data abstractions which provide primitive support for the high-level security guarantees, and help shield from the details of the underlying cryptographic infrastructure.
Being implemented on top of the OFMC verification tool, AnBx serves not only for specification and design, but also for security analysis of distributed protocols. Moreover the framework, keeping apart the protocol logic from the application logic, allow for automatic generation of Java source code of protocols specified in AnBx.
We demonstrate the practical effectiveness of our approach with the specification and analysis of two real-life e-payment protocols, obtaining stronger and more scalable security guarantees than those offered by the original ones.
In the second part of the thesis we formally analyze the Secure Vehicle Communication system (SeVeCom), using the AIF framework which is based on a novel set-abstraction technique. We report on two new attacks found and verify that under some reasonable assumptions, the system is secure.AnBx è un'estensione della notazione Alice & Bob per la descrizione di protocolli, ed è utilizzato come linguaggio di specifica per la modellazione puramente dichiarativa dei protocolli distribuiti. AnBx è costituito da un insieme di astrazioni sui dati e sui modi di comunicazione che forniscono il supporto di base per le proprietà di sicurezza ad alto livello, schermando i dettagli della infrastruttura crittografica sottostante. AnBx, essendo implementato sul tool di verifica OFMC, è utilizzabile non solo per specifica e la progettazione ma anche per l'analisi della sicurezza dei protocolli distribuiti. Inoltre il framework consente la generazione automatica del codice Java di protocolli descritti in AnBx, mantenendo separate la logica del protocollo dalla logica dell'applicazione. L'efficacia del nostro approccio è mostrata nella specifica ed nell'analisi di due protocolli di pagamento elettronico usati nel mondo reale, realizzando proprietà di sicurezza più forti e più scalabili rispetto a quelle delle versioni originali. Nella seconda parte della tesi analizziamo in maniera formale il sistema di comunicazione veicolare sicura (SeVeCom) utilizzando il framework AIF, che è basato su una nuova tecnica di set-abstraction. Nel corso del lavoro abbiamo trovato due nuovi attacchi, e verificato che sotto ragionevoli ipotesi il sistema è sicuro.
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Dobson, Lucas E. "Security analysis of session initiation protocol." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Jun/10Jun%5FDobson.pdf.
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Thesis (M.S. in Computer Science)--Naval Postgraduate School, June 2010.Thesis Advisor(s): Dinolt, George ; Eagle, Chris. "June 2010." Description based on title screen as viewed on July 13, 2010. Author(s) subject terms: Session initiation protocol, voice over IP, information security, siproxd, linphone, Qutecom, osip, eXosip Includes bibliographical references (p. 77-78). Also available in print.
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Araya, Cristian, and Manjinder Singh. "Web API protocol and security analysis." Thesis, KTH, Data- och elektroteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-208934.
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There is problem that every company has its own customer portal. This problem can be solved by creating a platform that gathers all customers’ portals in one place. For such platform, it is required a web API protocol that is fast, secure and has capacity for many users. Consequently, a survey of various web API protocols has been made by testing their performance and security. The task was to find out which web API protocol offered high security as well as high performance in terms of response time both at low and high load. This included an investigation of previous work to find out if certain protocols could be ruled out. During the work, the platform’s backend was also developed, which needed to implement chosen web API protocols that would later be tested. The performed tests measured the APIs’ connection time and their response time with and without load. The results were analyzed and showed that the protocols had both pros and cons. Finally, a protocol was chosen that was suitable for the platform because it offered high security and fast connection. In addition, the server was not affected negatively by the number of connections. Reactive REST was the web API protocol chosen for this platform.Det finns ett problem i dagens samhälle gällande att varje företag har sin egen kundportal. Detta problem kan lösas genom att skapa en plattform som samlar alla kundportaler på samma plats. För en sådan plattform krävs det ett web API protokoll som är snabb, säker och har kapacitet för många användare. Därför har en undersökning om olika web API protokolls prestanda samt säkerhetstester gjorts. Arbetet gick ut på att ta reda på vilket web API protokoll som erbjuder hög säkerhet och hög prestanda i form av svarstid både vid låg och hög belastning. Det ingick också i arbetet att göra en undersökning av tidigare arbeten för att ta reda på om eventuella protokoll kunde uteslutas. Under arbetet utvecklades också plattformens backend som implementerade de olika web API protokollen för att sedan kunna utföra tester på dessa. Testerna som utfördes var svarstid både med och utan belastning, uppkopplingstid samt belastning. Resultaten analyserades och visade att protokollen hade både för- och nackdelar. Avslutningsvis valdes ett protokoll som var lämpad för plattformen eftersom den hade hög säkerhet samt snabbast uppkopplingstid. Dessutom påverkades inte servern negativt av antalet uppkopplingar. Reactive REST valdes som web API protokoll för denna plattform.
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Jones, Benjamin Edward. "Improving security in the FDDI protocol." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23700.
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Hsu, Yating. "Formal Analysis of Network Protocol Security." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1317230784.
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Hanna, Youssef. "Verifying sensor network security protocol implementations." [Ames, Iowa : Iowa State University], 2008.
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Firing, Tia Helene. "Analysis of the Transport Layer Security protocol." Thesis, Norwegian University of Science and Technology, Department of Mathematical Sciences, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10025.
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In this master thesis we have presented a security analysis of the TLS protocol with particular emphasis on the recently discovered renegotiation attack. From our security proof we get that the Handshake protocol with renegotiation, including the fix from IETF, is secure, and hence not vulnerable to the renegotiation attack anymore. We have also analysed the Handshake protocol with session resumption, and the Application data protocol together with the Record protocol. Both of these protocols were deemed secure as well. All the security proofs are based on the UC (Universal Composability) security framework.
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Stergiou, Theodore. "Protocol security for third generation telecommunication systems." Thesis, University of Warwick, 2003. http://wrap.warwick.ac.uk/3023/.
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In this thesis, a novel protocol stack architecture is presented. The Future Core Networks System (FCNS) forms a secure reference model for use in packet-switched structures, with its applicability ranging from computer to telecommunication networks. An insight on currently used network protocol systems is given, analysing standardised sets of communication rules with respect to the security they afford to the messages exchanged. The lack of protection schemes for the internal protocol stack messages and the implementation pitfalls of their security architectures are described, in relation to the effects they have on the communication process. The OSI security model is also considered, with disadvantages identified in the placement of security functionality and its management. The drawbacks depicted for currently used systems form the motivation behind this work. The analysis of the FCNS follows, which is composed of three parts. In the first part, the FCNS communication layers are examined, with respect to the mechanisms used to establish, maintain and tear down a connection between peer entities. In the second part, the security mechanisms of the proposed reference architecture are given, including details on the FCNS keystream generator used for the security of the internal FCNS messages. Finally, the FCNS Error Protocol is depicted, illustrating the modes of operation and advantages it exhibits over currently used systems. The work then moves into presenting details of the software FCNS implementation, followed by the presentation of the results and measurements obtained by the case studies created. Comparisons are given in relation to the TCP/IP suite, to provide the means of identifying the FCNS applicability in various network environments. The work is concluded by presenting the FCNS functionality in delivering information for the UMTS, together with further work that may enhance the flexibility and use of the proposed architecture.
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Toth, David. "The Byzantine Agreement Protocol applied to security." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-01125-135622/.
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Al, Shahri Aied Fayez. "SNAP : a distributed authentication protocol." Thesis, University of Strathclyde, 2003. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21375.
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The explosive growth in network based applications and distributed systems allows the deployment of critical applications such as e-commerce, tele-banking, electronic government, etc. On the other hand, attacking networks and distributed systems becomes easier with the support of public cracking tools and the information sharing between hackers. Consequently, security is a crucial topic. Authentication is considered as one of the major components in security and, in fact, represents the front door for any secure system. It is an important requirement to ensure that the network resources are accessed only by authorized users, meanings that strong access control mechanisms are needed. Most existing authentication protocols are centralized such that a single authentication entity controls the authentication process. These traditional authentication protocols suffer from certain drawbacks pertaining to security, availability and trust. This thesis proposes and evaluates a novel authentication protocol: Secure Network Access Protocol (SNAP) that attempts to overcome some of the drawbacks of centralized authentication protocols. SNAP is a distributed authentication protocol and is based on secret sharing schemes which have a quorum access structure. Another significant contribution of this thesis has been to consider not only the security analysis of SNAP but also the implementation issues. SNAP is studied and found to be robust in term of its security, availability, overhead and performance. The implementation of SNAP is considered and the application of SNAP to a wireless networks undertaken. The research conducted has shown the need for distributed authentication protocols and the importance of studying the network implementation issues for any novel security protocol.
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Bengtsson, Filip, and Matteo Madrusan. "Near Field Communication Security concerns & applicable security in Android." Thesis, Högskolan Kristianstad, Fakulteten för naturvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-20996.
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Near Field Communication (NFC) is being used more frequent in smart devices, this raises security concerns whether the users information is secure from attackers. The thesis examines the threats that NFC on Android smartphones are exposed to, its countermeasures, as well as existing protocols that ensures the integrity and confidentiality of the users data. The results were achieved by a literature study, a questionnaire sent to companies that create products related to the subject as well as an experiment that was divided into two parts. The first part examined what information can be extracted from a debit card stored on an Android smartphone. The second part included a relay attack in which a purchase would be made with a victim’s debit card by using Android smartphones. The results shows that it is difficult to conduct any attack on the smart devices because of the limited range of NFC as well as the protocols available for making purchases with debit cards stored on smart devices disallows unauthorized applications and hardware to attack cards stored in smart devices.
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Kullenwall, Jonas. "Study of security aspects for Session Initiation Protocol." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1164.
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The objective with this thesis is to describe security mechanisms that are inte-grated or are proposed to be integrated with the Session Initiation Protocol (SIP). SIP is used for establishing, modifying, and terminating multimedia ses-sions over the IP network. This thesis is divided into two main parts, where the first part describes the implemented security mechanisms in SIP and the second part describes a number of proposed security mechanisms that may be implemented in SIP. At the end of the report there is a section that presents the scripts and results from different security tests that were performed on two implementations of SIP. Apart from describing different security mechanisms in the first part of this thesis, this section also contains an analysis on how possible security threats against SIP may be used to launch different attacks. The analysis also describes how these attacks may be prevented, if possible, by using the secu-rity mechanisms provided by SIP. The second part also contains an analysis section, which is focusing on finding the advantages and disadvantages of using a specific security mechanism compared to a similar security mechanism that is currently used or has been used in SIP. In the last section of this thesis I present my conclusions and a summary of the results.
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Tobler, Benjamin. "A Structured Approach to Network Security Protocol Implementation." Thesis, University of Cape Town, 2005. http://pubs.cs.uct.ac.za/archive/00000281/.
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The implementation of network security protocols has not received the same level of attention in the literature as their analysis. Security protocol analysis has successfully used inference logics, like GNY and BAN, and attack analysis, employing state space examination techniques such as model checking and strand spaces, to verify security protocols. Tools, such as the multi-dimensional analysis environment SPEAR II, exist to help automate security protocol specification and verification, however actual implementation of the specification in executable code is a task still largely left to human programmers. Many vulnerabilities have been found in implementations of security protocols such as SSL, PPTP and RADIUS that are incorporated into widely used operating system software, web servers and other network aware applications. While some of these vulnerabilities may be a result of flawed or unclear specifications, many are the result of the failure of programmers to correctly interpret and implement them.
The above indicates a gap between security protocol specifications and their concrete implementations, in that there are methodologies and tools that have been established for developing the former, but not the latter. This dissertation proposes an approach to bridging this gap, describes our implementation of that approach and attempts to evaluate its success. The approach is three-fold, providing different measures to improve current ad-hoc implementation approaches:
1. From Informal to Formal Specifications: If a security protocol has been specified using informal standard notation, it can be converted, using automatic translation, to a formal specification language with well defined semantics. The formal protocol specification can then be analysed using formal techniques, to verify that the desired security properties hold. The precise specification of the protocol behaviour further serves to facilitate the concrete implementation of the protocol in code.
2. Separate Implementation Concerns: When implementing security protocols, the what and the when of protocol actions are abstracted from the how. That is, protocol logic implementation concerns, such as when and what actions should be performed on messages, should be clearly and cleanly separated from the cryptographic and network communication implementation details that implement how the actions are performed. Such high level modularity allows code implementing protocol logic to be re-used with different cryptographic algorithm implementations and network communication protocols. It also allows errors in the implementation of the cryptography to be addressed by swapping cryptographic implementations without changing the protocol logic code. The abstraction of cryptographic and network implementation is analogous to the adoption of the Dolev-Yao style models by many analysis techniques, where the cryptography itself is viewed as a black box and assumed perfect, allowing the analysis to focus on the protocol logic. Finally, this separation allows the correctness of the protocol logic implementation and cryptographic primitives implementation to be addressed separately.
3. Automated Implementation Using Code Generation We use code generation to automate the security protocol implementation process, avoiding the risk of human error in interpreting the sometimes subtle semantics of security protocol specifications. The precise nature of formal specification languages provides a base from which to specify and implement an automatic code generation tool. Our approach follows requirements identified for high integrity code generation - where feasible - to give a high level of confidence in the correctness of the generated code.
In implementing the approach, we adopt the Spi Calculus for the role of formal specification language. The Spi Calculus was developed by extending the -calculus, a process algebra for describing concurrent communicating systems, to cater for the special case of network security protocols. Spi Calculus specifications can be analysed manually, by developing correctness proofs by hand, and automatically, by using model checkers such as MMC. As Spi Calculus specifications explicitly describe the actions of a security protocol, they are also particularly suitable for use as input for code generation. The implementation of the approach is split across three components that correspond to each of the parts of the approach:
1. Sn2Spi is a translator that converts an informal standard notation specification to a Spi Calculus specification, thus implementing part 1 of our approach. The converted specification can be analysed using any of the formal techniques applicable to the Spi Calculus. Once verified, the specification can be used to generate a concrete implementation using Spi2Java.
2. The Security Protocol Primitives API abstracts cryptographic and network communication
operations, decoupling code that implements protocol logic from code that implements cryptographic and network operations. It provides the basic cryptographic and network communications functionality required to implement a security protocol, including: symmetric and asymmetric encryption, message digest, nonce and timestamp generation, marshalling message component data and sending and receiving messages over a network. A provider model, much like that used in the Java Cryptography Extensions API, is employed to allow different implementations to be swapped without changing the SPP client code.
3. Spi2Java is a code generator, essentially implementing a compiler from the Spi Calculus to Java code. Spi2Java uses Prolog to implement a defined mapping from Spi Calculus constructs, i.e. terms and process actions, to Java code segments. These code segments call the SPP API to access cryptographic and network functionality where needed. The mapping was developed by refining Spi constructs to Java code segments that preserve the semantics of the Spi constructs In addition, assertions are made in the code segments to ensure certain conditions are met before the implementation can continue running.
Part of evaluating the effectiveness of this automated approach to security protocol implementation, involved a case study where manual implementations of the CCITT Three Message X.509 Protocol, developed by 4th year Computer Science students, and a Spi2Java generated implementation are compared. The outcome of the study favoured the automatically generated implementation, indicating the potential of the approach.
Further to demonstrating the utility of code generation, we describe an SPP provider implementation developed to allow a security protocol run, including legitimate and attacker roles, to be simulated in a controlled environment. Spi2Java allows the protocol engineer to quickly and automatically generate code for protocol roles. The code can be executed using this implementation allowing the protocol engineer to step through execution of all roles, both legitimate and attacker, to gain insight into the behaviour of the protocol.
The approach is evaluated in terms of the class of attacks it prevents and how it meets the identified requirements for high integrity code generation. It is also compared to existing and current work in the field. Attack classes that exploit faulty protocol logic implementation, vulnerability to type flaws and buffer overflows are prevented. The Spi2Java code generator fully meets three of the five high integrity code generation requirements: formally defined source and target languages are used; the translation software is validated; and the generated code is well structured and documented and can be traced back to the specification. Spi2Java partially meets the requirement that the mapping from source to target language constructs be formally proven to preserve the specification semantics. However the arguments given are not strictly formal. The requirement related to rigorous testing are not met due to practical resource constraints. However, Spi2Java has been used to generate real world protocol implementations that have been verified by manual inspection.
Sprite, incorporating the Sn2Spi translator and Spi2Java code generator, provides a structured approach to network security protocol implementation by implementing automated translation from informal to formal security protocol specifications, and by being able to automatically generate Java implementations of network security protocols in which the security protocol engineer can have a high degree of confidence.
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Chen, Hao. "A Search-Based Framework for Security Protocol Synthesis." Thesis, University of York, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.495440.
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Security protocol verification has been the area where the bulk of the research in cryptographic protocols has taken place and a number of successful supporting tools have been developed. However, not much research has been done in the area of applying formal methods to the design of cryptographic protocols in the first place, despite wide recognition that the design of cryptographic protocols is very difficult. Most existing protocols have been designed using informal methods and heavily rely on the verification process to pick up vulnerabilities. The research reported in this thesis shows how to automatically synthesise abstract protocols using heuristic search, explains how to add high-level efficiency concerns to the synthesis, and demonstrates how to refine the abstract protocols to executable Java Code.
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Lasorso, Daniel. "Watershed Security Telemetry Network Protocol for Reliability Assurance." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1258576929.
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Ozan, Orhan. "Denial of service attacks on 802.1X security protocol." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FOzan.pdf.
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Muhammad, Shahabuddin. "EXTENDING DISTRIBUTED TEMPORAL PROTOCOL LOGIC TO A PROOF BASED FRAMEWORK FOR AUTHENTICATION PROTOCOLS." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3086.
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Running critical applications, such as e-commerce, in a distributed environment requires assurance of the identities of the participants communicating with each other. Providing such assurance in a distributed environment is a difficult task. The goal of a security protocol is to overcome the vulnerabilities of a distributed environment by providing a secure way to disseminate critical information into the network. However, designing a security protocol is itself an error-prone process. In addition to employing an authentication protocol, one also needs to make sure that the protocol successfully achieves its authentication goals. The Distributed Temporal Protocol Logic (DTPL) provides a language for formalizing both local and global properties of distributed communicating processes. The DTPL can be effectively applied to security protocol analysis as a model checker. Although, a model checker can determine flaws in a security protocol, it can not provide proof of the security properties of a protocol. In this research, we extend the DTPL language and construct a set of axioms by transforming the unified framework of SVO logic into DTPL. This results into a deductive style proof-based framework for the verification of authentication protocols. The proposed framework represents authentication protocols and concisely proves their security properties. We formalize various features essential for achieving authentication, such as message freshness, key association, and source association in our framework. Since analyzing security protocols greatly depends upon associating a received message to its source, we separately analyze the source association axioms, translate them into our framework, and extend the idea for public-key protocols. Developing a proof-based framework in temporal logic gives us another verification tool in addition to the existing model checker. A security property of a protocol can either be verified using our approach, or a design flaw can be identified using the model checker. In this way, we can analyze a security protocol from both perspectives while benefiting from the representation of distributed temporal protocol logic. A challenge-response strategy provides a higher level of abstraction for authentication protocols. Here, we also develop a set of formulae using the challenge-response strategy to analyze a protocol at an abstract level. This abstraction has been adapted from the authentication tests of the graph-theoretic approach of strand space method. First, we represent a protocol in logic and then use the challenge-response strategy to develop authentication tests. These tests help us find the possibility of attacks on authentication protocols by investigating the originator of its received messages. Identifying the unintended originator of a received message indicates the existence of possible flaws in a protocol. We have applied our strategy on several well-known protocols and have successfully identified the attacks.Ph.D.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Computer Science PhD
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SINIGAGLIA, FEDERICO. "Security Analysis of Multi-Factor Authentication Security Protocols." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1010670.
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Multi-Factor Authentication (MFA) is being increasingly adopted by on- line services in order to achieve an adequate level of security. MFA is based on security protocols, called MFA protocols, that integrate the use of credentials with additional identity proofs, called authentication factors (based on knowledge, possession or inherence). The authentication factors are provided through specific objects, called authenticators (e.g., hardware token). To date, MFA has been widely adopted in the most diverse security-critical application scenarios (e.g., online banking, eHealth). Various solutions have been proposed, leveraging MFA protocols which employ different kinds of authenticators and providing different user experience. When considering various MFA protocols, few questions may arise. How do MFA protocols differ in terms of (i) level of protection, (ii) compliance w.r.t. current regulations and (iii) complexity for the user?
To answer the question concerning the level of protection, traditional verification techniques for security protocols require a formal specification of the protocol under analysis. However, as a matter of fact, several service providers employ ad-hoc MFA protocols and do not disclose their internals. In addition, classical attacker models, such as the Dolev-Yao adversary, hardly apply. Hence, new protocol modeling techniques and new attacker models should be investigated.
Concerning regulations, public and private authorities have introduced directives and guidelines for the design of MFA protocols (e.g., recommendations for online payment services from the European Banking Authority, and the guidelines from NIST about the digital identity management through MFA). In principle, these initiatives aim to guide the design of more secure and usable MFA protocols, but there is no evidence that the existing MFA protocols actually comply with the aforementioned regulations. Thus, a novel methodology is needed to provide such an evidence.
The ease-of-use is a relevant aspect to be considered in the analysis of an MFA protocol. Indeed, the use of multiple authenticators in the execution of an MFA protocol can negatively affect user experience, which can have an impact on its security as well. However, none of the research works managed to measure the usability of a conspicuous number of MFA protocols design. Hence, a methodology for evaluating the ease-of-use of an MFA protocol should be identified.
In this work, we propose a framework to analyze MFA protocols, which does not rely on the implementation details, being able to assess the (i) level of protection, (ii) compliance w.r.t. current regulations and (iii) complexity for the user.
To this aim, we define a specification language which is compatible with the typical (amount of) information publicly released by service providers on the employed MFA protocols. For what concerns the security analysis, we propose an evaluation of MFA protocols in terms of resistance against a set of attacker models, tailored for the specific case of MFA protocols. For what concerns the regulatory aspects and best practices, we include the possibility to evaluate a protocol in terms of compliance with a customizable set of requirements and best practices. Furthermore, for what concerns the ease-of-use of an MFA protocol, we propose a new metric, called complexity, for evaluating a protocol in terms of efforts that an user is required to perform during its execution.
The aforementioned framework has been then implemented in a working tool, MuFASA, allowing (even non-expert) users to model an MFA protocol and to automatically analyze it.
Finally, the presented framework has been applied on some selected use cases. First, it has been employed in the early stages of the design of a novel MFA protocol, integrated into the Citizens’ Clinical Record platform developed in the Trentino region (Italy). Then, it has been used for performing a latitudinary study on online banking services, allowing us to model and analyze more than 150 MFA protocols employed by banks all over the world.
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Khan, Moazzam. "Security metric based risk assessment." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47527.
Full textAbstract:
Modern day computer networks have become very complex and attackers have benefited due to this complexity and have found vulnerabilities and loopholes in the network architecture. In order to identify the attacks from an attacker all aspects of network architecture needs to be carefully examined such as packet headers, network scans, versions of applications, network scans, network anomalies etc. and after the examination attributes playing a significant impact on the security posture of the organization needs to be highlighted so that resources and efforts are directed towards those attributes. In this work we extensively look at network traffic at dormitory network of a large campus and try to identify the attributes that play a significant role in the infection of a machine. Our scheme is to collect as much attributes from the network traffic applying the heuristic of network infection and then devise a scheme called decision centric rank ordering of security metric that gives the priority to the security metrics so that network administrators can channel their efforts in the right direction. Another aspect of this research is to identify the probability of an attack on a communication infrastructure. A communication infrastructure becomes prone to attack if certain elements exist in it, such as vulnerabilities in the comprising elements of the system, existence of an attacker and motivation for him to attack. Focus of this study is on vulnerability assessment and security metrics such as user behavior, operating systems, user applications, and software updates. To achieve a quantified value of risk, a set of machines is carefully observed for the security metrics. Statistical analysis is applied on the data collected from compromised machines and the quantified value of risk is achieved.
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Giancecchi, Nicola. "Analysis and Implementation of the Messaging Layer Security Protocol." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18467/.
Full textAbstract:
The use of messaging services on smartphones has increased considerably in recent years, due to the growth in the availability of mobile devices and the evolution of communication technologies via Internet, factors that have effectively replaced the use of text messages.
This increase also concerned the use in the business environment, a context where the exchange of confidential information is more frequent and therefore the need to protect communication between two or more people. This is important not only on a security point of view, but also for personal privacy. The major global players have responded by implementing security measures within their services, such as end-to-end encryption and increasingly strict rules regarding the processing of personal data.
In this thesis we will illustrate Messaging Layer Security, shortened as MLS, a new protocol under development that guarantees security and efficiency in group conversations. When in a conversation between two clients, security can be ensured through end-to-end encryption and key exchange. The problem arises when multiple actors participate in the conversation asynchronously: in this case the computational effort is considerable, even more so considering the use of mobile devices with reduced battery capacity that does not guarantee the continuous presence of the online device.
The thesis will deal with both the architectural part, that is more general and traces the outline of the subject, and the protocol part, more technical and detailed. Finally, an implementation of MLS written in Rust and called Melissa will be illustrated, which provides all the basic functionalities indicated in the draft 05 version of the protocol.
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Werstén, Bengt. "Implementing the Transport Layer Security Protocol for Embedded Systems." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8767.
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Web servers are increasingly being used in embedded devices as a communication medium. As more systems connect to the Internet, the need for security is increasing. The Transport Layer Protocol (TLS) is the successor of Secure Socket Layer (SSL) and provides security in almost all secure Internet transactions. This thesis aims to investigate if TLS can be adapted to embedded systems without sacrificing much of the system resources available.
A literature study and an implementation of TLS have been performed. The literature study determined resource intense parts of TLS, hardware support as well as export laws applicable to TLS. The different parts of the implementation are evaluated on an ARM7-core to determine the execution times. The results for the symmetric ciphers AES and 3DES are compared when measuring execution times using both software and hardware solutions. The size of the implementation is also measured.
TLS was shown to be able to integrate on embedded systems. Practical issues such as certificates and keys can be solved in different ways to suite the target environment. The largest remaining issue is the execution time for asymmetric algorithms. The results that are provided clearly illustrates that the RSA used for key exchange is very time consuming. Alternative solutions to gain better performance are discussed.
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Al-Jaljouli, Raja Computer Science & Engineering Faculty of Engineering UNSW. "A proposed security protocol for data gathering mobile agents." Awarded by:University of New South Wales. School of Computer Science and Engineering, 2006. http://handle.unsw.edu.au/1959.4/23999.
Full textAbstract:
We address the security issue of the data which mobile agents gather as they are traversing the Internet. Our goal is to devise a security protocol that truly secures the data which mobile agents gather. Several cryptographic protocols were presented in the literature asserting the security of gathered data. Formal verification of the protocols reveals unforeseen security flaws, such as truncation or alteration of the collected data, breaching the privacy of the gathered data, sending others data under the private key of a malicious host, and replacing the collected data with data of similar agents. So the existing protocols are not truly secure. We present an accurate security protocol which aims to assert strong integrity, authenticity, and confidentiality of the gathered data. The proposed protocol is derived from the Multi-hops protocol. The protocol suffers from security flaws, e.g. an adversary might truncate/ replace collected data, or sign others data with its own private key without being detected. The proposed protocol refines the Multi-hops protocol by implementing the following security techniques: utilization of co-operating agents, scrambling the gathered offers, requesting a visited host to clear its memory from any data acquired as a result of executing the agent before the host dispatches the agent to the succeeding host in the agent???s itinerary, and carrying out verifications on the identity of the genuine initiator at the early execution of the agent at visited hosts, in addition to the verifications upon the agent???s return to the initiator. The proposed protocol also implements the common security techniques such as public key encryption, digital signature, etc. The implemented security techniques would rectify the security flaws revealed in the existing protocols. We use STA, an infinite-state exploration tool, to verify the security properties of a reasonably small instance of the proposed protocol in key configurations. The analysis using STA reports no attack. Moreover, we carefully reason the correctness of the security protocol for a general model and show that the protocol would be capable of preventing or at least detecting the attacks revealed in the existing protocols.
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Hoernecke, Andrew Todd. "Security Integrated Messaging a protocol for secure electronic mail /." [Ames, Iowa : Iowa State University], 2007.
Find full text
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Amoah, Raphael. "Formal security analysis of the DNP3-Secure Authentication Protocol." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/93798/1/Raphael_Amoah_Thesis.pdf.
Full textAbstract:
This thesis evaluates the security of Supervisory Control and Data Acquisition (SCADA) systems, which are one of the key foundations of many critical infrastructures. Specifically, it examines one of the standardised SCADA protocols called the Distributed Network Protocol Version 3, which attempts to provide a security mechanism to ensure that messages transmitted between devices, are adequately secured from rogue applications. To achieve this, the thesis applies formal methods from theoretical computer science to formally analyse the correctness of the protocol.
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LaValley, Jason. "Next Generation RFID Randomization Protocol." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20471.
Full textAbstract:
Radio Frequency IDentification (RFID) is a wireless communications technology which allows companies to secure their assets and increase the portability of information. This research was motivated by the increased commercial use of RFID technology. Existing security protocols with high levels of security have high computation requirements, and less intensive protocols can allow a tag to be tracked. The techniques proposed in this thesis result in the increase of ciphertexts available without a significant increase in processing power or storage requirements. The addition of random inputs to the generation of ciphertexts will increase the number of possible results without requiring a more advanced encryption algorithm or an increased number of stored encryption keys. Four methods of altering the plaintext/ciphertext pair (random block, set pattern, random pattern, and indexed placement) are analyzed to determine the effectiveness of each method. The number of ciphertexts generated, generation time, and generation errors were recorded to determine which of the four proposed methods would be the most beneficial in a RFID system. The comparison of these method characteristics determined that the set pattern placement method provided the best solution. The thesis also discusses how RFID transmissions appear to attackers and explains how the random inputs reduce effectiveness of current system attacks. In addition to improving the anonymity of RFID tag transmissions, the concept of authenticating random inputs is also introduced in this thesis. These methods help prevent an adversary from easily associating a tag with its transmissions, thus increasing the security of the RFID system.
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Ninet, Tristan. "Formal verification of the Internet Key Exchange (IKEv2) security protocol." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S002.
Full textAbstract:
Dans cette thèse, nous analysons le protocole IKEv2 à l'aide de trois outils de vérification formelle : Spin, ProVerif et Tamarin. Pour effectuer l'analyse avec Spin, nous étendons une méthode existante de modélisation. En particulier, nous proposons un modèle de la signature numérique, du MAC et de l'exponentiation modulaire, nous simplifions le modèle d'adversaire pour le rendre applicable à des protocoles complexes, et nous proposons des modèles de propriétés d'authentification. Nos analyses montrent que l'attaque par réflexion, une attaque trouvée par une précédente analyse, n'existe pas. De plus, nos analyses avec ProVerif et Tamarin produisent de nouvelles preuves concernant les garanties d'accord non injectif et d'accord injectif pour IKEv2 dans le modèle non borné. Nous montrons ensuite que la faille de pénultième authentification, une vulnérabilité considérée comme bénigne par les analyses précédentes, permet en fait d'effectuer un nouveau type d'attaque par déni de service auquel IKEv2 est vulnérable : l'Attaque par Déviation. Cette attaque est plus difficile à détecter que les attaques par déni de service classiques mais est également plus difficile à réaliser. Afin de démontrer concrètement sa faisabilité, nous attaquons avec succès une implémentation open-source populaire de IKEv2. Les contre-mesures classiques aux attaques DoS ne permettent pas d'éviter cette attaque. Nous proposons alors deux modifications simples du protocole, et prouvons formellement que chacune d'entre elles empêche l'Attaque par DéviationIn this thesis, we analyze the IKEv2 protocol specification using three formal verification tools: Spin, ProVerif and Tamarin. To perform the analysis with Spin, we extend and improve an existing modeling method with a simpler adversary model and a model for common cryptographic primitives and Lowe's authentication properties. As a result we show that the reflection attack, an attack found by a previous analysis, is actually not applicable. Moreover, our analysis using ProVerif and Tamarin provides new results regarding non-injective agreement and injective agreement guaranties of IKEv2 in the unbounded model. We then show that the penultimate authentication flaw, a vulnerability that was considered harmless by previous analyses, actually allows for a new type of Denial-of-Service attack, which works against IKEv2: the Deviation Attack. The Deviation Attack is harder to detect than existing DoS attacks, but is also harder to perform. To concretely demonstrate the attack, we successfully implement it against a popular open-source implementation of IKEv2. Finally, we study the use of existing DoS countermeasures and existing configuration options to defeat the attack, but we only find mitigations or incomplete workarounds. We therefore tackle the problem at a higher level: we propose two possible inexpensive modifications of the protocol, and formally prove that they both prevent the attack
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Shahidi, Hamed. "Security Challenges of Communication Protocols in IoT : Comparing security features of ZigBee and Z-Wave communication protocols in IoT devices." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-40113.
Full textAbstract:
This research studies the security challenges in IoT devices. At first, security challenges have been described and then specifically the security of communication protocols in the IoT has been addressed. Finally, among different communication protocols, ZigBee and Z-Wave protocols have been chosen for this study. The criterion for choosing these two protocols is the level of security they provide for IoT devices to protect them against unauthorized access and hacking. Security, frequency, power consumption and data rate are the characteristics that have been discussed in the review of these two protocols. In the end, a comparison of the various features of these two protocols clarified that the security of IoT devices in each of these protocols depends on the type of the IoT device, the required range and other requirements, however, in most cases the ZigBee protocol showed more security than Z-Wave.
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Šafář, Jan. "Návrh zero-knowledge protokolů." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237255.
Full textAbstract:
Thesis introduces automated methods of protocol design and their usability for zero knowledge protocol design or protocols, where ZK protocols are used as subprotocols. Especially composition method is described more in depth. Thesis shows also a sample implementation of this method.
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Darroca, Gregorio G. "Framework for a Link Layer Packet Filtering (LLPF) security protocol." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA355533.
Full textAbstract:
Thesis (M.S. in Information Technology Management) Naval Postgraduate School, September 1998.Thesis advisor(s): Geoffrey Xie, Cynthia Irvine, Rex Buddenberg. "September 1998."-Cover. Includes bibliographical references (p. 181-183). Also available online.
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Cambazoglu, Volkan. "Protocol, mobility and adversary models for the verification of security." Licentiate thesis, Uppsala universitet, Avdelningen för datorteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202017.
Full textAbstract:
The increasing heterogeneity of communicating devices, ranging from resource constrained battery driven sensor nodes to multi-core processor computers, challenges protocol design. We examine security and privacy protocols with respect to exterior factors such as users, adversaries, and computing and communication resources; and also interior factors such as the operations, the interactions and the parameters of a protocol. Users and adversaries interact with security and privacy protocols, and even affect the outcome of the protocols. We propose user mobility and adversary models to examine how the location privacy of users is affected when they move relative to each other in specific patterns while adversaries with varying strengths try to identify the users based on their historical locations. The location privacy of the users are simulated with the support of the K-Anonymity protection mechanism, the Distortion-based metric, and our models of users' mobility patterns and adversaries' knowledge about users. Security and privacy protocols need to operate on various computing and communication resources. Some of these protocols can be adjusted for different situations by changing parameters. A common example is to use longer secret keys in encryption for stronger security. We experiment with the trade-off between the security and the performance of the Fiat–Shamir identification protocol. We pipeline the protocol to increase its utilisation as the communication delay outweighs the computation. A mathematical specification based on a formal method leads to a strong proof of security. We use three formal languages with their tool supports in order to model and verify the Secure Hierarchical In-Network Aggregation (SHIA) protocol for Wireless Sensor Networks (WSNs). The three formal languages specialise on cryptographic operations, distributed systems and mobile processes. Finding an appropriate level of abstraction to represent the essential features of the protocol in three formal languages was central.QC 20170217
ProFuN
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Shu, Guoqiang. "Formal Methods and Tools for Testing Communication Protocol System Security." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211333211.
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Raffo, Daniele. "Security schemes for the OLSR protocol for ad hoc networks." Paris 6, 2005. http://www.theses.fr/2005PA066241.
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Maji, Saurav. "Energy-efficient protocol and hardware for security of implantable devices." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122701.
Full textAbstract:
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 77-83).
Modern-day bio-electronics has truly revolutionized monitoring, diagnosis, and treatment of disease. The continued development of microelectronic has fueled the development of implantable and wearable devices by enabling them with increased functionality and features. According to the report, global active implantable medical devices (IMDs) market was valued at approximately USD 16.47 billion in 2017 and is expected to generate revenue of around USD 23.33 billion by the end of 2024 [63]. However, the deployment of these devices is limited by their security concerns. Several attacks have been demonstrated on IMDs by exploiting their weaknesses [29, 36, 38, 58, 72]. Although these attacks have been demonstrated for academic investigation, these are enough to confirm that the security of these systems needs to be addressed more aggressively. In this work, we analyze the security concerns in the design of the IMDs and the interactions with the other parties involved. Based on this analysis, we propose a protocol to address some of the shortcomings. Our protocol features a dual-factor authentication system in the IMD that relies on both cryptographic security as well as voluntary human actions before responding to any request. We discuss the merits of the protocol and analyze the trade-offs involved. The proposed protocol is implemented in an energy-efficient integrated circuit-and-system solution to emulate an actual implantable device. The design decisions involved to make the system energy-efficient and to accelerate the cryptographic computation are analyzed in detail. Finally, the impact of the implemented protocol on the entire system is obtained and discussed for various use-cases.
"Analog Devices Fellowship and Analog Devices Inc. for providing financial support during various phases of this project"
by Saurav Maji.
S.M.
S.M. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
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Kojovic, Ivana. "An automatic protocol composition checker." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for telematikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19105.
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Formal analysis is widely used to prove security properties of the protocols. There are tools to check protocols in isolation, but in fact we use many protocols in parallel or even vertically stacked, e.g. running an application protocol (like login) over a secure channel (like TLS) and in general it is unclear if that is safe. There are several works that give sufficient conditions for parallel and vertical composition, but there exists no program to check whether these conditions are actually met by a given suite of protocols.The aim of the master thesis project is to implement a protocol composition checker and present it as a service for registering protocols and checking compatibility of the protocols among each other. In order to establish the checker, it is necessary to collect and integrate different conditions defined through the literature. Also, we will define a framework based on Alice and Bob notation, so the checker can examine protocols in an unambiguous manner.Further we will develop a library of widely-used protocols like TLS that are provenly compatible with each other and define a set of negative example proto- cols to test the checker.We want to implement the checker as an extension of the existing Open-Source Fixed-Point Model-Checker OFMC to easily integrate our composition checker with a existing verification procedure that support Alice and Bob notation.
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Talkington, Gregory Joshua. "Shepherding Network Security Protocols as They Transition to New Atmospheres: A New Paradigm in Network Protocol Analysis." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1609134/.
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The solutions presented in this dissertation describe a new paradigm in which we shepherd these network security protocols through atmosphere transitions, offering new ways to analyze and monitor the state of the protocol. The approach involves identifying a protocols transitional weaknesses through adaption of formal models, measuring the weakness as it exists in the wild by statically analyzing applications, and show how to use network traffic analysis to monitor protocol implementations going into the future. Throughout the effort, we follow the popular Open Authorization protocol in its attempts to apply its web-based roots to a mobile atmosphere. To pinpoint protocol deficiencies, we first adapt a well regarded formal analysis and show it insufficient in the characterization of mobile applications, tying its transitional weaknesses to implementation issues and delivering a reanalysis of the proof. We then measure the prevalence of this weakness by statically analyzing over 11,000 Android applications. While looking through source code, we develop new methods to find sensitive protocol information, overcome hurdles like obfuscation, and provide interfaces for later modeling, all while achieving a false positive rate of below 10 percent. We then use network analysis to detect and verify application implementations. By collecting network traffic from Android applications that use OAuth, we produce a set of metrics that when fed into machine learning classifiers, can identify if the OAuth implementation is correct. The challenges include encrypted network communication, heterogeneous device types, and the labeling of training data.
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Khalid, Muhammad Adnan, and Qamar Nazir. "Security Issue of BGP in complex Peering and Transit Networks." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2447.
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Border Gateway Protocol (BGP) is a critical routing protocol of the internet, used to
exchange routing information between autonomous systems (ASes). BGP is highly
vulnerable to many attacks that can cause routing disturbance on the internet. This
paper describes BGP attacks, misconfigurations, causes of misconfigurations, impact
of these attacks and misconfigurations in BGP and counter measures. Also we
analyze new security architectures for BGP, comparison of these security protocols
and their deployment issues. At the end we propose new security solution that is
Defensive Routing Policy (DRP) to prevent BGP from malicious attacks and
misconfigurations. DRP is operationally deployable and very effective to solve BGP
problems.
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Raheem, Ali Hussein. "An integrated security protocol communication scheme for Internet of Things using the Locator/ID Separation Protocol network." Thesis, Middlesex University, 2017. http://eprints.mdx.ac.uk/22173/.
Full textAbstract:
Internet of Things communication is mainly based on a machine-to-machine pattern, where devices are globally addressed and identified. However, as the number of connected devices increase, the burdens on the network infrastructure increase as well. The major challenges are the size of the routing tables and the efficiency of the current routing protocols in the Internet backbone. To address these problems, an Internet Engineering Task Force (IETF) working group, along with the research group at Cisco, are still working on the Locator/ID Separation Protocol as a routing architecture that can provide new semantics for the IP addressing, to simplify routing operations and improve scalability in the future of the Internet such as the Internet of Things. Nonetheless, The Locator/ID Separation Protocol is still at an early stage of implementation and the security Protocol e.g. Internet Protocol Security (IPSec), in particular, is still in its infancy. Based on this, three scenarios were considered: Firstly, in the initial stage, each Locator/ID Separation Protocol-capable router needs to register with a Map-Server. This is known as the Registration Stage. Nevertheless, this stage is vulnerable to masquerading and content poisoning attacks. Secondly, the addresses resolving stage, in the Locator/ID Separation Protocol the Map Server (MS) accepts Map-Request from Ingress Tunnel Routers and Egress Tunnel Routers. These routers in trun look up the database and return the requested mapping to the endpoint user. However, this stage lacks data confidentiality and mutual authentication. Furthermore, the Locator/ID Separation Protocol limits the efficiency of the security protocol which works against redirecting the data or acting as fake routers. Thirdly, As a result of the vast increase in the different Internet of Things devices, the interconnected links between these devices increase vastly as well. Thus, the communication between the devices can be easily exposed to disclosures by attackers such as Man in the Middle Attacks (MitM) and Denial of Service Attack (DoS). This research provided a comprehensive study for Communication and Mobility in the Internet of Things as well as the taxonomy of different security protocols. It went on to investigate the security threats and vulnerabilities of Locator/ID Separation Protocol using X.805 framework standard. Then three Security protocols were provided to secure the exchanged transitions of communication in Locator/ID Separation Protocol. The first security protocol had been implemented to secure the Registration stage of Locator/ID separation using ID/Based cryptography method. The second security protocol was implemented to address the Resolving stage in the Locator/ID Separation Protocol between the Ingress Tunnel Router and Egress Tunnel Router using Challenge-Response authentication and Key Agreement technique. Where, the third security protocol had been proposed, analysed and evaluated for the Internet of Things communication devices. This protocol was based on the authentication and the group key agreement via using the El-Gamal concept. The developed protocols set an interface between each level of the phase to achieve security refinement architecture to Internet of Things based on Locator/ID Separation Protocol. These protocols were verified using Automated Validation Internet Security Protocol and Applications (AVISPA) which is a push button tool for the automated validation of security protocols and achieved results demonstrating that they do not have any security flaws. Finally, a performance analysis of security refinement protocol analysis and an evaluation were conducted using Contiki and Cooja simulation tool. The results of the performance analysis showed that the security refinement was highly scalable and the memory was quite efficient as it needed only 72 bytes of memory to store the keys in the Wireless Sensor Network (WSN) device.
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Veisllari, Raimena. "Employing Ethernet Multiple Spanning Tree Protocol in an OpMiGua network." Thesis, Norwegian University of Science and Technology, Department of Telematics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10913.
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Hybrid optical packet/circuit switched networking architectures are increasingly becoming an interesting research field. They integrate and combine the high resource utilization of statistically multiplexed packet switched networks with the low processing requirements and guaranteed quality of service provided by circuit switched networks. The aim of this thesis is to integrate the OpMiGua hybrid optical network with Ethernet. Specifically, the work is focused on the compatibility of the Ethernets loop-free topology protocols with the redundant multiple traffic service paths of OpMiGua. We analyse the problems and limitations imposed on the network architecture and propose our topology solution called the SM chain-connectivity. The analysis and the proposed schemes are verified based on results obtained from simulations. Furthermore, we design an integrated logical OpMiGua node that relies on an Ethernet switch instead of the Optical Packet Switch for the Statistically Multiplexed traffic. To date, to our knowledge there are no studies analysing the compatibility of Ethernet and its protection mechanisms in a hybrid optical network. This is the first work addressing the use of Ethernet in OpMiGua.
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Hellsing, Mattias, and Odervall Albin. "Efficient Multi-Core Implementation of the IPsec Encapsulating Security Payload Protocol for a Single Security Association." Thesis, Linköpings universitet, Programvara och system, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-151984.
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As the mobile Internet traffic increases, the workload of the base stations processing this traffic increases with it. To cope with this, the telecommunication providers responsible for the systems deployed in these base stations have looked to parallelism. This, together with the fact that these providers have a vested interest in protecting their users' data from potential attackers, means that there is a need for efficient parallel packet processing software which handles encryption as well as authentication. A well known protocol for encryption and authentication of IP packets is the Encapsulating Security Payload (ESP) protocol of the IPsec protocol suite. IPsec establishes simplex connections, called Security Associations (SA), between entities that wish to communicate. This thesis investigates a special case of this problem where the work of encrypting and authenticating the packets within a single SA is parallelized. This problem was investigated by developing and comparing two multi-threaded implementations based on the Eventdev, an event driven programming library, and ring buffer libraries of Data Plane Development Kit (DPDK). One additional Eventdev-based implementation was also investigated which schedules linked lists of packets, instead of single packets, in an attempt to reduce the overhead of scheduling packets to the worker cores. These implementations were then evaluated in terms of throughput, latency, speedup, and last level cache miss rates. The results showed that the ring buffer-based implementation performed the best in all metrics while the single packet-scheduling Eventdev-based implementation was outperformed by the one using linked lists of packets. It was shown that the packet generation, which was done by the receiving core, was the main limiting factor for all implementations. In addition, the memory resources such as the memory bus, memory controller and prefetching hardware were shown to likely be an area of contention and a possible bottleneck as the packet generation rate increases. The conclusion drawn from this was that a parallelized packet retrieval solution such as Receive Side Scaling (RSS) together with minimizing memory resource contention is necessary to further improve performance.
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Liyanage, M. (Madhusanka). "Enhancing security and scalability of Virtual Private LAN Services." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526213767.
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Abstract Ethernet based VPLS (Virtual Private LAN Service) is a transparent, protocol independent, multipoint L2VPN (Layer 2 Virtual Private Network) mechanism to interconnect remote customer sites over IP (Internet Protocol) or MPLS (Multiprotocol Label Switching) based provider networks. VPLS networks are now becoming attractive in many Enterprise applications, such as DCI (data center interconnect), voice over IP (VoIP) and videoconferencing services due to their simple, protocol-independent and cost efficient operation. However, these new VPLS applications demand additional requirements, such as elevated security, enhanced scalability, optimum utilization of network resources and further reduction in operational costs. Hence, the motivation of this thesis is to develop secure and scalable VPLS architectures for future communication networks. First, a scalable secure flat-VPLS architecture is proposed based on a Host Identity Protocol (HIP). It contains a session key-based security mechanism and an efficient broadcast mechanism that increase the forwarding and security plane scalability of VPLS networks. Second, a secure hierarchical-VPLS architecture is proposed to achieve control plane scalability. A novel encrypted label-based secure frame forwarding mechanism is designed to transport L2 frames over a hierarchical VPLS network. Third, a novel Distributed Spanning Tree Protocol (DSTP) is designed to maintain a loop free Ethernet network over a VPLS network. With DSTP it is proposed to run a modified STP (Spanning Tree Protocol) instance in each remote segment of the VPLS network. In addition, two Redundancy Identification Mechanisms (RIMs) termed Customer Associated RIMs (CARIM) and Provider Associated RIMs (PARIM) are used to mitigate the impact of invisible loops in the provider network. Lastly, a novel SDN (Software Defined Networking) based VPLS (Soft-VPLS) architecture is designed to overcome tunnel management limitations in legacy secure VPLS architectures. Moreover, three new mechanisms are proposed to improve the performance of legacy tunnel management functions: 1) A dynamic tunnel establishment mechanism, 2) a tunnel resumption mechanism and 3) a fast transmission mechanism. The proposed architecture utilizes a centralized controller to command VPLS tunnel establishment based on real-time network behavior. Hence, the results of the thesis will help for more secure, scalable and efficient system design and development of VPLS networks. It will also help to optimize the utilization of network resources and further reduction in operational costs of future VPLS networksTiivistelmä Ethernet-pohjainen VPLS (Virtual Private LAN Service) on läpinäkyvä, protokollasta riippumaton monipisteverkkomekanismi (Layer 2 Virtual Private Network, L2VPN), jolla yhdistetään asiakkaan etäkohteet IP (Internet Protocol)- tai MPLS (Multiprotocol Label Switching) -yhteyskäytäntöön pohjautuvien palveluntarjoajan verkkojen kautta. VPLS-verkoista on yksinkertaisen protokollasta riippumattoman ja kustannustehokkaan toimintatapansa ansiosta tullut kiinnostavia monien yrityssovellusten kannalta. Tällaisia sovelluksia ovat esimerkiksi DCI (Data Center Interconnect), VoIP (Voice over IP) ja videoneuvottelupalvelut. Uusilta VPLS-sovelluksilta vaaditaan kuitenkin uusia asioita, kuten parempaa tietoturvaa ja skaalautuvuutta, optimaalista verkkoresurssien hyödyntämistä ja käyttökustannusten pienentämistä entisestään. Tämän väitöskirjan tarkoituksena onkin kehittää turvallisia ja skaalautuvia VPLS-arkkitehtuureja tulevaisuuden tietoliikenneverkoille. Ensin väitöskirjassa esitellään skaalautuva ja turvallinen flat-VPLS-arkkitehtuuri, joka perustuu Host Identity Protocol (HIP) -protokollaan. Seuraavaksi käsitellään istuntoavaimiin perustuvaa tietoturvamekanismia ja tehokasta lähetysmekanismia, joka parantaa VPLS-verkkojen edelleenlähetyksen ja tietoturvatason skaalautuvuutta. Tämän jälkeen esitellään turvallinen, hierarkkinen VPLS-arkkitehtuuri, jolla saadaan aikaan ohjaustason skaalautuvuus. Väitöskirjassa kuvataan myös uusi salattu verkkotunnuksiin perustuva tietokehysten edelleenlähetysmekanismi, jolla L2-kehykset siirretään hierarkkisessa VPLS-verkossa. Lisäksi väitöskirjassa ehdotetaan uuden Distributed Spanning Tree Protocol (DSTP) -protokollan käyttämistä vapaan Ethernet-verkkosilmukan ylläpitämiseen VPLS-verkossa. DSTP:n avulla on mahdollista ajaa muokattu STP (Spanning Tree Protocol) -esiintymä jokaisessa VPLS-verkon etäsegmentissä. Väitöskirjassa esitetään myös kaksi Redundancy Identification Mechanism (RIM) -mekanismia, Customer Associated RIM (CARIM) ja Provider Associated RIM (PARIM), joilla pienennetään näkymättömien silmukoiden vaikutusta palveluntarjoajan verkossa. Viimeiseksi ehdotetaan uutta SDN (Software Defined Networking) -pohjaista VPLS-arkkitehtuuria (Soft-VPLS) vanhojen turvallisten VPLS-arkkitehtuurien tunnelinhallintaongelmien poistoon. Näiden lisäksi väitöskirjassa ehdotetaan kolmea uutta mekanismia, joilla voidaan parantaa vanhojen arkkitehtuurien tunnelinhallintatoimintoja: 1) dynaaminen tunnelinluontimekanismi, 2) tunnelin jatkomekanismi ja 3) nopea tiedonsiirtomekanismi. Ehdotetussa arkkitehtuurissa käytetään VPLS-tunnelin luomisen hallintaan keskitettyä ohjainta, joka perustuu reaaliaikaiseen verkon käyttäytymiseen. Tutkimuksen tulokset auttavat suunnittelemaan ja kehittämään turvallisempia, skaalautuvampia ja tehokkaampia VLPS järjestelmiä, sekä auttavat hyödyntämään tehokkaammin verkon resursseja ja madaltamaan verkon operatiivisia kustannuksia
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Ondráček, David. "Databáze specifikací bezpečnostních protokolů." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235438.
Full textAbstract:
Original protocols, which were created during early development of computer networks, no longer provide sufficient security. This is the reason why new protocols are developed and implemented. The important component of this process is formal verification, which is used to analyze the developed protocols and check whether a successful attack is possible or not. This thesis presents selected security protocols and tools for their formal verification. Further, the selected protocols are specified in LySa calculus and results of their analysis using LySatool are presented and discussed.
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Sifatullah, Bhuiyan Mohammad. "Securing Mobile Payment Protocol based on EMV Standard." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121512.
Full textAbstract:
This is an era of communication technology. This era has faced a lot of innovation in technology sector. Mobile phones were once used for calling or text messaging only, now slowly becoming competitor of computers. The rapid development of hardware, software and operating system of smartphones made it possible to do multiple tasks through the phones. Nowadays, smart phones have powerful operating systems which provide wide range of applications. Smart phones can be interfaced with external hardware also. The payment industry is about to see a drastic change because of these features. People can now pay through their smartphones; they can use payment cards to pay through it etc. But financial transaction is a very sensitive service and security is very crucial here. For financial services, the major security services such as confidentiality, integrity, authenticity, authorization and non-repudiation must be ensured. There are two major types of payment cards, magnetic-stripe based cards and chip based cards. Chip based card provides better security. Magnetic stripe based cards being static, is easy to counterfeit. But the fact that these magnetic stripe cards are still used in many countries, it is necessary to provide a security solution in order to protect customers from treachery. In this thesis, it has been investigated how to secure the mobile payment based on EMV standard. EMV is a chip based payment card. It has strong security features which made skimming or tampering it very hard. But, Magstripe based payments still remained insecure. This thesis paper aims to secure the transaction when paid with magnetic stripe based cards. Several measures have been taken to ensure that major security services are met. In addition, a prototype was developed and tested to demonstrate the practicality of the designed solution. The research results of this paper show that by transacting through the secured mobile payment protocol, customers can avail payment service more securely than traditional magnetic striped card based payments.
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Georgiades, Andrew. "A security protocol for authentication of binding updates in Mobile IPv6." Thesis, Middlesex University, 2011. http://eprints.mdx.ac.uk/7955/.
Full textAbstract:
Wireless communication technologies have come along way, improving with every generational leap. As communications evolve so do the system architectures, models and paradigms. Improvements have been seen in the jump from 2G to 3G networks in terms of security. Yet these issues persist and will continue to plague mobile communications into the leap towards 4G networks if not addressed. 4G will be based on the transmission of Internet packets only, using an architecture known as mobile IP. This will feature many advantages, however security is still a fundamental issue to be resolved. One particular security issue involves the route optimisation technique, which deals with binding updates. This allows the corresponding node to by-pass the home agent router to communicate directly with the mobile node. There are a variety of security vulnerabilities with binding updates, which include the interception of data packets, which would allow an attacker to eavesdrop on its contents, breaching the users confidentiality, or to modify transmitted packets for the attackers own malicious purposes. Other possible vulnerabilities with mobile IP include address spoofing, redirection and denial of service attacks. For many of these attacks, all the attacker needs to know is the IPv6 addresses of the mobile's home agent and the corresponding node. There are a variety of security solutions to prevent these attacks from occurring. Two of the main solutions are cryptography and authentication. Cryptography allows the transmitted data to be scrambled in an undecipherable way resulting in any intercepted packets being illegible to the attacker. Only the party possessing the relevant key will be able to decrypt the message. Authentication is the process of verifying the identity of the user or device one is in communication with. Different authentication architectures exist however many of them rely on a central server to verify the users, resulting in a possible single point of attack. Decentralised authentication mechanisms would be more appropriate for the nature of mobile IP and several protocols are discussed. However they all posses' flaws, whether they be overly resource intensive or give away vital address data, which can be used to mount an attack. As a result location privacy is investigated in a possible attempt at hiding this sensitive data. Finally, a security solution is proposed to address the security vulnerabilities found in binding updates and attempts to overcome the weaknesses of the examined security solutions. The security protocol proposed in this research involves three new security techniques. The first is a combined solution using Cryptographically Generated Addresses and Return Routability, which are already established solutions, and then introduces a new authentication procedure, to create the Distributed Authentication Protocol to aid with privacy, integrity and authentication. The second is an enhancement to Return Routability called Dual Identity Return Routability, which provides location verification authentication for multiple identities on the same device. The third security technique is called Mobile Home Agents, which provides device and user authentication while introducing location privacy and optimised communication routing. All three security techniques can be used together or individually and each needs to be passed before the binding update is accepted. Cryptographically Generated Addresses asserts the users ownership of the IPv6 address by generating the interface identifier by computing a cryptographic one-way hash function from the users' public key and auxiliary parameters. The binding between the public key and the address can be verified by recomputing the hash value and by comparing the hash with the interface identifier. This method proves ownership of the address, however it does not prove the address is reachable. After establishing address ownership, Return Routability would then send two security tokens to the mobile node, one directly and one via the home agent. The mobile node would then combine them together to create an encryption key called the binding key allowing the binding update to be sent securely to the correspondent node. This technique provides a validation to the mobile nodes' location and proves its ownership of the home agent. Return Routability provides a test to verify that the node is reachable. It does not verify that the IPv6 address is owned by the user. This method is combined with Cryptographically Generated Addresses to provide best of both worlds. The third aspect of the first security solution introduces a decentralised authentication mechanism. The correspondent requests the authentication data from both the mobile node and home agent. The mobile sends the data in plain text, which could be encrypted with the binding key and the home agent sends a hash of the data. The correspondent then converts the data so both are hashes and compares them. If they are the same, authentication is successful. This provides device and user authentication which when combined with Cryptographically Generated Addresses and Return Routability create a robust security solution called the Distributed Authentication Protocol. The second new technique was designed to provide an enhancement to a current security solution. Dual Identity Return Routability builds on the concept of Return Routability by providing two Mobile IPv6 addresses on a mobile device, giving the user two separate identities. After establishing address ownership with Cryptographically Generated Addresses, Dual Identity Return Routability would then send security data to both identities, each on a separate network and each having heir own home agents, and the mobile node would then combine them together to create the binding key allowing the binding update to be sent securely to the correspondent node. This technique provides protection against address spoofing as an attacker needs two separate ip addresses, which are linked together. Spoofing only a single address will not pass this security solution. One drawback of the security techniques described, however, is that none of them provide location privacy to hide the users IP address from attackers. An attacker cannot mount a direct attack if the user is invisible. The third new security solution designed is Mobile Home Agents. These are software agents, which provide location privacy to the mobile node by acting as a proxy between it and the network. The Mobile Home Agent resides on the point of attachment and migrates to a new point of attachment at the same time as the mobile node. This provides reduced latency communication and a secure environment for the mobile node. These solutions can be used separately or combined together to form a super security solution, which is demonstrated in this thesis and attempts to provide proof of address ownership, reachability, user and device authentication, location privacy and reduction in communication latency. All these security features are design to protect against one the most devastating attacks in Mobile IPv6, the false binding update, which can allow an attacker to impersonate and deny service to the mobile node by redirecting all data packets to itself. The solutions are all simulated with different scenarios and network configurations and with a variety of attacks, which attempt to send a false binding update to the correspondent node. The results were then collected and analysed to provide conclusive proof that the proposed solutions are effective and robust in protecting against the false binding updates creating a safe and secure network for all.
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Lightfoot, Leonard E. "An energy efficient link-layer security protocol for wireless sensor networks." Diss., Connect to online resource - MSU authorized users, 2006.
Find full textAbstract:
Thesis (M.S.)--Michigan State University. Dept. of Electrical & Computer Engineering, 2006.Title from PDF t.p. (viewed on Nov. 20, 2008) Includes bibliographical references (p. 49-55). Also issued in print.
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Abdelmajid, Nabih T. "Innovative Location Based Scheme for Internet Security Protocol. A proposed Location Based Scheme N-Kerberos Security Protocol Using Intelligent Logic of Believes, Particularly by Modified BAN Logic." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5270.
Full textAbstract:
The importance of the data authentication has resulted in the science of the data protection. Interest in this knowledge has been growing due to the increase in privacy of the user's identity, especially after the widespread use of online transactions. Many security techniques are available to maintain the privacy of the user's identity. These include password, smart card or token and face recognition or finger print. But unfortunately, the possibility to duplicate the identity of a user is still possible. Recently, specialists used the user's physical location as a new factor in order to increase the strength of the verification of the user's identity. This thesis focused on the authentication-based user's location. It is based on the idea of using the Global Position System in order to verify the user identity. Improving Kerberos protocol using GPS signal is proposed in order to eliminate the effect of replay attack. This proposal does not expect a high performance from the user during the implementation of the security system. Moreover, to give users more confidence to use security protocol, it has to be evaluated before accepting it. Thus, a measurement tool used to validate protocols called BAN logic was described. In this thesis, a new form of BAN logic which aims to raise the efficiency checking process of the protocol protection strength using the GPS signal is proposed. The proposed form of Kerberos protocol has been analysed using the new form of BAN logic. The new scheme has been tested and compared with the existing techniques to demonstrate its merits and capabilities.
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Chen, Bangdao. "Using human interactive security protocols to secure payments." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:f73a0165-410f-4a69-a56c-b6f004253ba3.
Full textAbstract:
We investigate using Human Interactive Security Protocols (HISPs) to secure payments. We start our research by conducting extensive investigations into the payment industry. After interacting with different payment companies and banks, we present two case studies: online payment and mobile payment. We show how to adapt HISPs for payments by establishing the reverse authentication method. In order to properly and thoroughly evaluate different payment examples, we establish two attack models which cover the most commonly seen attacks against payments. We then present our own payment solutions which aim at solving the most urgent security threats revealed in our case studies. Demonstration implementations are also made to show our advantages. In the end we show how to extend the use of HISPs into other domains.