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Auflistung nach Schlagwort "Sender Identification"

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  • Textdokument
    Effects of the Sampling Technique on Sender Identification Systems for the Controller Area Network
    (INFORMATIK 2020, 2021) Kneib, Marcel; Schell, Oleg
    As a result of the ongoing development of vehicle electronics and additional wireless communication interfaces, the possibilities for attacks and their negative consequences are increasing. Once an attacker has obtained access to the internal vehicle communication, in the case of the Controller Area Network (CAN) the attacker is able to forge all messages of the connected Electronic Control Units (ECUs) without a receiving ECU being able to recognize any suspicious behavior. The use of cryptographic methods is only possible to a limited extent due to restricted resources of the ECUs, which is why sender identification systems have been presented which are able to detect these kind of attacks. Presented approaches use different procedures to capture the analog signals on which the detection of attacks respectively the identification of the sender is based. This work shows that the impact on the performance of the sender identification system by the different sampling methods is minimal and therefore the selection of the appropriate technique can be mainly based on the available resources and the communication structure of the corresponding vehicle platform. This is shown on the one hand by the direct analysis of the analog signals captured from a real vehicle as well as by an evaluation of the previously introduced sampling methods using a recently published sender identification system. In addition, an assessment of the procedures based on different parameters shows which method is to be preferred for which application.
  • Konferenzbeitrag
    A Survey on Sender Identification Methodologies for the Controller Area Network
    (SICHERHEIT 2020, 2020) Kneib, Marcel
    The connectivity of modern vehicles is constantly increasing and consequently also the amount of attack vectors. Researchers have shown that it is possible to access internal vehicle communication via wireless connections, allowing the manipulation of safety-critical functions such as brakes and steering. If a Electronic Control Unit (ECU) can be compromised and is connected to the internal vehicle bus, attacks on the vehicle can be carried out in particular by impersonating other bus participants. Problematic is that the Controller Area Network (CAN), the most commonly used bus technology for internal vehicle communication, does not provide trustworthy information about the sender. Thus ECUs are not able to recognize whether a received message was sent by an authorized sender. Due to the limited applicability of cryptographic measures for the CAN, sender identification methods were presented that can determine the sender of a received message based on physical characteristics. Such approaches can increase the security of internal vehicle networks so that, for example, the manipulations can be limited to a single bus segment, thus preventing the propagation of the attack. This paper presents the different methodologies, which can mainly be divided into the categories time- and voltage-based, identifies problems as well as open questions and compares the existing approaches. The work thus offers an introduction into the topic, identifies possible research fields and enables a quick evaluation of the existing technologies.