Статті в журналах з теми "Certificats SSL/TLS"
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1
Lapshichyov, Vitaly V. "TLS Certificates of the Tor Network and Their Distinctive Features." International Journal of Systems and Software Security and Protection 10, no. 2 (July 2019): 20–43. http://dx.doi.org/10.4018/ijsssp.2019070102.
Повний текст джерелаАнотація:
This article presents the results of an experimental study of the properties of SSL/TLS certificates of an anonymous Tor network, based on which it is concluded that there are several features that differ from other SSL/TLS certificates. At present, in the scientific literature and in the documentation of U.S. National Security Agency, and the U.K. Government Communications Headquarters devoted to the identification of Tor network traffic, two signs of SSL/TLS certificates are indicated - the name of the certificate subject, as well as the port of the certificate transmission and network connection. The results of an experimental study allow the authors to state with a high degree of probability that Tor network certificates can be identified in the data stream between the client and server of the specified network by their size, which is between 400 and 600 bytes. The list of features of the Tor network certificates is intended to develop software or add-ons to existing ones, which is used to block access of Internet users to Darknet resources or to limit the use of the Tor anonymous network service. Based on data on the distinguishing features of Tor network certificates, an algorithm is proposed for blocking access to the Internet for users of the Tor Bundle.
2
Foppe, Lucas, Jeremy Martin, Travis Mayberry, Erik C. Rye, and Lamont Brown. "Exploiting TLS Client Authentication for Widespread User Tracking." Proceedings on Privacy Enhancing Technologies 2018, no. 4 (October 1, 2018): 51–63. http://dx.doi.org/10.1515/popets-2018-0031.
Повний текст джерелаАнотація:
Abstract TLS, and SSL before it, has long supported the option for clients to authenticate to servers using their own certificates, but this capability has not been widely used. However, with the development of its Push Notification Service, Apple has deployed this technology on millions of devices for the first time. Wachs et al. [42] determined iOS client certificates could be used by passive network adversaries to track individual devices across the internet. Subsequently, Apple has patched their software to fix this vulnerability. We show these countermeasures are not effective by demonstrating three novel active attacks against TLS Client Certificate Authentication that are successful despite the defenses. Additionally, we show these attacks work against all known instances of TLS Client Certificate Authentication, including smart cards like those widely deployed by the Estonian government as part of their Digital ID program. Our attacks include in-path man-in-the-middle versions as well as a more powerful on-path attack that can be carried out without full network control.
3
Park, Jun-Cheol. "Cookie-Based Identification of the Public Keys of TLS/SSL Certificates." Journal of Korean Institute of Communications and Information Sciences 41, no. 1 (January 31, 2016): 101–3. http://dx.doi.org/10.7840/kics.2015.41.1.101.
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Cueva Hurtado, Mario E., and Diego Javier Alvarado Sarango. "Análisis de Certificados SSL/TLS gratuitos y su implementación como Mecanismo de seguridad en Servidores de Aplicación." Enfoque UTE 8, no. 1 (February 24, 2017): 273–86. http://dx.doi.org/10.29019/enfoqueute.v8n1.128.
Повний текст джерелаАнотація:
La seguridad en la capa de aplicación (SSL), proporciona la confidencialidad, integridad y autenticidad de los datos, entre dos aplicaciones que se comunican entre sí. El presente artículo es el resultado de haber implementado certificados SSL / TLS gratuitos en servidores de aplicación, determinando las características relevantes que debe tener un certificado SSL/TLS, la Autoridad certificadora que lo emita. Se realiza un análisis de las vulnerabilidades en los servidores web y se establece un canal cifrado de comunicaciones con el fin de proteger de ataques como hombre en el medio, phising y mantener la integridad de la información que es trasmitida entre el cliente y servidor.
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Lapshichyov, Vitaly V., and Oleg B. Makarevich. "Detection and identification method of the tor bundle use." Informatization and communication, no. 3 (May 5, 2020): 17–20. http://dx.doi.org/10.34219/2078-8320-2020-11-3-17-20.
Повний текст джерелаАнотація:
This paper presents the result of author’s research aimed at developing a detecting and identifying method of the Tor Bundle use in data transmission networks, in particular, on the Internet. Based on these characteristics, an algorithm has been developed that allows legitimate blocking of user access to a global network by a popular anonymizer. The subject of the study was an SSL/TLS encryption certificate, which is transmitted by the Tor network server to the user of the Tor Bundle and which contains the set of data necessary for its identification during the implementation of the TLS “handshake”. In the course of the study of the certificates features, several distinguishing features were identified, namely: the name of the subject and issuer of the certificate, which is a random set of letters and numbers; port used when connecting to an anonymous network; certificate size. Based on the data received, a method is proposed that allows the provider’s server to block the connection during which a certificate with certain characteristics is transmitted.
6
Tian, Cong, Chu Chen, Zhenhua Duan, and Liang Zhao. "Differential Testing of Certificate Validation in SSL/TLS Implementations." ACM Transactions on Software Engineering and Methodology 28, no. 4 (October 12, 2019): 1–37. http://dx.doi.org/10.1145/3355048.
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7
Martynenkov, I. V. "THE MAIN STAGES OF DEVELOPMENT OF THE CRYPTOGRAPHIC PROTOCOLS SSL/TLS AND IPsec." Prikladnaya Diskretnaya Matematika, no. 51 (2021): 31–67. http://dx.doi.org/10.17223/20710410/51/2.
Повний текст джерелаАнотація:
The paper discusses the main stages of development of cryptographic protocols from SSL 2.0 (Secure Socket Layer) to TLS 1.3 (Transport Layer Security), which ensure the protection of transport layer data in the OSI model. A brief description of the modification of the RuTLS protocol based on TLS 1.3 and their main differences is given. The development of IPsec, which provides cryptographic protection of communications at the network level of the OSI model, is considered using examples of the development of the three most commonly used protocols. These include IKE (Internet Key Exchange), AH (Authentication Header), and ESP (Encapsulation Security Payload). For the SSL/TLS and IPsec specifications, the basic handshake protocols and the main stages of their development are considered. The described handshakes include primary cryptographic information exchange cycles in the form of identifiers of interaction participants, one-time numbers, lists of supported cryptographic combinations. Authentication of participants based on certificates, shared symmetric keys, data exchange for establishing a shared Diffie — Hellman secret, development of key material for secret keys of communication sessions, message authentication, and other cryptographic parameters are presented. For different versions of SSL/TLS and IPsec, the logical structures of application data cryptographic protection functions are described.
8
Wang, Yingjie, Guangquan Xu, Xing Liu, Weixuan Mao, Chengxiang Si, Witold Pedrycz, and Wei Wang. "Identifying vulnerabilities of SSL/TLS certificate verification in Android apps with static and dynamic analysis." Journal of Systems and Software 167 (September 2020): 110609. http://dx.doi.org/10.1016/j.jss.2020.110609.
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Lapshichyov, Vitaly, and Oleg Makarevich. "Method for Detecting and Identification of Tor Network Data by Wireshark Analyzer." Voprosy kiberbezopasnosti, no. 4(44) (2021): 73–80. http://dx.doi.org/10.21681/2311-3456-2021-4-73-80.
Повний текст джерелаАнотація:
Purpose of the study: development of a method that allows detecting and identifying packets of the Tor network, including obfuscated packets on the local machine of the network user, by a Wireshark sniffer using the filter syntax based on the features of the Tor network packets characteristic of the TLS v1.2 and v1.3 encryption versions; studying the possibility of using the SSL Bump attack (decrypting https traffic on a virtual server using self-signed x.509 certificates) to overcome the obfuscation of Tor network packets. Method: software analysis of transmitted network packets, decomposition of the contents of data packets according to their size and belonging to encryption protocols, a comparative method in relation to different versions of the encryption protocol and resources, synthesis of filtering rules based on the syntax of the analyzer was used. Results: an applied method was developed that allows detecting and identifying packets of the Tor Network, including obfuscated packets on the local machine of the network user, by a Wireshark sniffer based on the filtering syntax based on the signs of encryption packets of the TLS v1.2 and v1.3 versions; data on the impossibility of using the SSL Bump attack to overcome the obfuscation of the Tor network was obtained.
10
Asratian, R. E. "Secure Network Channel for Web Services based on SSL/TLS Technology in a Linux Environment." Programmnaya Ingeneria 13, no. 3 (March 23, 2022): 124–31. http://dx.doi.org/10.17587/prin.13.124-131.
Повний текст джерелаАнотація:
An approach to the organization of secure interaction in distributed systems via a public network is considered, based on the organization of secure communication channels based on sSl/TLS technology. Unlike VPN technology, the described approach is strictly focused on supporting only HTTP/SOAP interactions in distributed systems, which allows you to implement authentication and authorization based on HTTP-header data and client public key certificates as ready-made technical solutions. The approach implies the use of special gateways that provide switching from HTTP to HTTPS on the client side and switching from HTTPS to HTTP on the web server side and make up a "transparent" communication channel for system components. It is assumed that both client programs and web servers are located in the same secure private network (or even on the same network node) with the gateways serving them, and only the interaction between the gateways is carried out through the public network. The work of gateways is based on the use of SSL/TLS technology to add a secure channel over an already open TCP connection. The main idea of the approach is that in this case, security tools are connected at high levels of the OSI protocol hierarchy, which allows gateways to analyze high-level parameters of information requests and responses of web servers contained in HTTP-headers. And this, in turn, allows you to add additional "intelligence" to the gateways associated with authentication of servers and clients, as well as with the differentiation of access rights to information resources up to individual functions (methods) of web services based on the data contained in "Subject Name" attribute of public key certificates. The implementation of the approach in the Linux environment and the results of an experimental study are described. In particular, the study showed that when calling service functions with a runtime of 0.5 seconds or higher, the secure channel increases the total query execution time by only a few percent, even with a rather large amount of data being transmitted (up to 200 kilobytes).
11
Pan, Jiaye, Yi Zhuang, and Binglin Sun. "Efficient and Transparent Method for Large-Scale TLS Traffic Analysis of Browsers and Analogous Programs." Security and Communication Networks 2019 (October 27, 2019): 1–22. http://dx.doi.org/10.1155/2019/8467081.
Повний текст джерелаАнотація:
Many famous attacks take web browsers as transmission channels to make the target computer infected by malwares, such as watering hole and domain name hijacking. In order to protect the data transmission, the SSL/TLS protocol has been widely used to defeat various hijacking attacks. However, the existence of such encryption protection makes the security software and devices confront with the difficulty of analyzing the encrypted malicious traffic at endpoints. In order to better solve this kind of situation, this paper proposes a new efficient and transparent method for large-scale automated TLS traffic analysis, named as hyper TLS traffic analysis (HTTA). It extracts multiple types of valuable data from the target system in the hyper mode and then correlates them to decrypt the network packets in real time, so that overall data correlation analysis can be performed on the target. Additionally, we propose an aided reverse engineering method to support the analysis, which can rapidly identify the target data in different versions of the program. The proposed method can be applied to the endpoints and cloud platforms; there are no trust risk of certificates and no influence on the target programs. Finally, the real experimental results show that the method is feasible and effective for the analysis, which leads to the lower runtime overhead compared with other methods. It covers all the popular browser programs with good adaptability and can be applied to the large-scale analysis.
12
Kang, James Jin, Kiran Fahd, and Sitalakshmi Venkatraman. "Trusted Time-Based Verification Model for Automatic Man-in-the-Middle Attack Detection in Cybersecurity." Cryptography 2, no. 4 (December 5, 2018): 38. http://dx.doi.org/10.3390/cryptography2040038.
Повний текст джерелаАнотація:
Due to the prevalence and constantly increasing risk of cyber-attacks, new and evolving security mechanisms are required to protect information and networks and ensure the basic security principles of confidentiality, integrity, and availability—referred to as the CIA triad. While confidentiality and integrity can be achieved using Secure Sockets Layer (SSL)/Transport Layer Security (TLS) certificates, these depend on the correct authentication of servers, which could be compromised due to man-in-the-middle (MITM) attacks. Many existing solutions have practical limitations due to their operational complexity, deployment costs, as well as adversaries. We propose a novel scheme to detect MITM attacks with minimal intervention and workload to the network and systems. Our proposed model applies a novel inferencing scheme for detecting true anomalies in transmission time at a trusted time server (TTS) using time-based verification of sent and received messages. The key contribution of this paper is the ability to automatically detect MITM attacks with trusted verification of the transmission time using a learning-based inferencing algorithm. When used in conjunction with existing systems, such as intrusion detection systems (IDS), which require comprehensive configuration and network resource costs, it can provide a robust solution that addresses these practical limitations while saving costs by providing assurance.
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Journal, Baghdad Science. "The Impact of Operating System on Bandwidth in Open VPN Technology." Baghdad Science Journal 13, no. 1 (March 6, 2016): 204–11. http://dx.doi.org/10.21123/bsj.13.1.204-211.
Повний текст джерелаАнотація:
The internet is a basic source of information for many specialities and uses. Such information includes sensitive data whose retrieval has been one of the basic functions of the internet. In order to protect the information from falling into the hands of an intruder, a VPN has been established. Through VPN, data privacy and security can be provided. Two main technologies of VPN are to be discussed; IPSec and Open VPN. The complexity of IPSec makes the OpenVPN the best due to the latter’s portability and flexibility to use in many operating systems. In the LAN, VPN can be implemented through Open VPN to establish a double privacy layer(privacy inside privacy). The specific subnet will be used in this paper. The key and certificate will be generated by the server. An authentication and key exchange will be based on standard protocol SSL/TLS. Various operating systems from open source and windows will be used. Each operating system uses a different hardware specification. Tools such as tcpdump and jperf will be used to verify and measure the connectivity and performance. OpenVPN in the LAN is based on the type of operating system, portability and straightforward implementation. The bandwidth which is captured in this experiment is influenced by the operating system rather than the memory and capacity of the hard disk. Relationship and interoperability between each peer and server will be discussed. At the same time privacy for the user in the LAN can be introduced with a minimum specification.
14
Jornet-Monteverde, Julio Antonio, and Juan José Galiana-Merino. "Low-Cost Conversion of Single-Zone HVAC Systems to Multi-Zone Control Systems Using Low-Power Wireless Sensor Networks." Sensors 20, no. 13 (June 27, 2020): 3611. http://dx.doi.org/10.3390/s20133611.
Повний текст джерелаАнотація:
This paper presents a novel approach to convert a conventional house air conditioning installation into a more efficient system that individually controls the temperature of each zone of the house through Wi-Fi technology. Each zone regulates the air flow depending on the detected temperature, providing energy savings and increasing the machine performance. Therefore, the first step was to examine the communication bus of the air conditioner and obtain the different signal codes. Thus, an alternative Controller module has been designed and developed to control and manage the requests on the communication bus (Bus–Wi-Fi gateway). A specific circuit has been designed to adapt the signal of the serial port of the Controller with the communication bus. For the acquisition of the temperature and humidity data in each zone, a Node module has been developed, which communicates with the Controller through the Wi-Fi interface using the Message Queuing Telemetry Transport (MQTT) protocol with Secure Sockets Layer / Transport Layer Security (SSL/TLS) certificates. It has been equipped with an LCD touch screen as a human-machine interface. The Controller and the Node modules have been developed with the ultra-low power consumption CC3200 microController of Texas Instruments and the code has been implemented under the TI-RTOS real-time operating system. An additional module based on the Raspberry Pi computer has been designed to create the Wi-Fi network and implement the required network functionalities. The developed system not only ensures that the temperature in each zone is the desired one, but also controls the fan velocity of the indoor unit and the opening area of the vent registers, which considerably improves the efficiency of the system. Compared with the single-zone system, the experiments carried out show energy savings between 75% and 94% when only one of the zones is selected, and 44% when the whole house is air-conditioned, in addition to considerably improving user comfort.
15
Nie, Pengbo, Chengcheng Wan, Jiayu Zhu, Ziyi Lin, Yuting Chen, and Zhendong Su. "Coverage-Directed Differential Testing of X.509 Certificate Validation in SSL/TLS Implementations." ACM Transactions on Software Engineering and Methodology, April 19, 2022. http://dx.doi.org/10.1145/3510416.
Повний текст джерелаАнотація:
SSL and TLS are two secure protocols for creating secure connections over the Internet. X.509 certificate validation is important for security and needs to be performed before an SSL/TLS connection is established. Some advanced testing techniques, such as frankencert , have revealed, through randomly mutating Internet accessible certificates, that there exist unexpected, sometimes critical, validation differences among different SSL/TLS implementations. Despite these efforts, X.509 certificate validation still needs to be thoroughly tested as this work shows. This paper tackles this challenge by proposing transcert , a coverage-directed technique to much more effectively test real-world certificate validation code. Our core insight is to (1) leverage easily accessible Internet certificates as seed certificates, and (2) use code coverage to direct certificate mutation towards generating a set of diverse certificates. The generated certificates are then used to reveal discrepancies, thus potential flaws, among different certificate validation implementations. We implement transcert and evaluate it against frankencert , NEZHA , and RFCcert (three advanced fuzzing techniques) on five widely used SSL/TLS implementations. The evaluation results clearly show the strengths of transcert — during 10,000 iterations, transcert reveals 71 unique validation differences, 12 ×, 1.4 ×, and 7 × as many as those revealed by frankencert , NEZHA and RFCcert , respectively; it also supplements RFCcert in conformance testing of the SSL/TLS implementations against 120 validation rules, 85 of which are exclusively covered by transcert -generated certificates. We identify 17 root causes of validation differences, all of which have been confirmed and eleven have never been reported previously. The transcert -generated X.509 certificates also reveal that the primary goal of certificate chain validation is stated ambiguously in the widely-adopted PKI standard RFC 5280.
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Liu, Anyi, Ali Alqazzaz, Hua Ming, and Balakrishnan Dharmalingam. "IoTVerif: Automatic Verification of SSL/TLS Certificate for IoT Applications." IEEE Access, 2020, 1. http://dx.doi.org/10.1109/access.2019.2961918.
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Hu, Qinwen, Muhammad Rizwan Asghar, and Nevil Brownlee. "A large-scale analysis of HTTPS deployments: Challenges, solutions, and recommendations." Journal of Computer Security, November 27, 2020, 1–26. http://dx.doi.org/10.3233/jcs-200070.
Повний текст джерелаАнотація:
HTTPS refers to an application-specific implementation that runs HyperText Transfer Protocol (HTTP) on top of Secure Socket Layer (SSL) or Transport Layer Security (TLS). HTTPS is used to provide encrypted communication and secure identification of web servers and clients, for different purposes such as online banking and e-commerce. However, many HTTPS vulnerabilities have been disclosed in recent years. Although many studies have pointed out that these vulnerabilities can lead to serious consequences, domain administrators seem to ignore them. In this study, we evaluate the HTTPS security level of Alexa’s top 1 million domains from two perspectives. First, we explore which popular sites are still affected by those well-known security issues. Our results show that less than 0.1% of HTTPS-enabled servers in the measured domains are still vulnerable to known attacks including Rivest Cipher 4 (RC4), Compression Ratio Info-Leak Mass Exploitation (CRIME), Padding Oracle On Downgraded Legacy Encryption (POODLE), Factoring RSA Export Keys (FREAK), Logjam, and Decrypting Rivest–Shamir–Adleman (RSA) using Obsolete and Weakened eNcryption (DROWN). Second, we assess the security level of the digital certificates used by each measured HTTPS domain. Our results highlight that less than 0.52% domains use the expired certificate, 0.42% HTTPS certificates contain different hostnames, and 2.59% HTTPS domains use a self-signed certificate. The domains we investigate in our study cover 5 regions (including ARIN, RIPE NCC, APNIC, LACNIC, and AFRINIC) and 61 different categories such as online shopping websites, banking websites, educational websites, and government websites. Although our results show that the problem still exists, we find that changes have been taking place when HTTPS vulnerabilities were discovered. Through this three-year study, we found that more attention has been paid to the use and configuration of HTTPS. For example, more and more domains begin to enable the HTTPS protocol to ensure a secure communication channel between users and websites. From the first measurement, we observed that many domains are still using TLS 1.0 and 1.1, SSL 2.0, and SSL 3.0 protocols to support user clients that use outdated systems. As the previous studies revealed security risks of using these protocols, in the subsequent studies, we found that the majority of domains updated their TLS protocol on time. Our 2020 results suggest that most HTTPS domains use the TLS 1.2 protocol and show that some HTTPS domains are still vulnerable to the existing known attacks. As academics and industry professionals continue to disclose attacks against HTTPS and recommend the secure configuration of HTTPS, we found that the number of vulnerable domain is gradually decreasing every year.