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Attack potential and efficient security enhancement of automotive bus networks using short MACs with rapid key change

: Bittl, Sebastian

Postprint urn:nbn:de:0011-n-2892491 (198 KByte PDF)
MD5 Fingerprint: faffd47cdaed8d20235bb9f8402fbe55
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Created on: 18.4.2015

Sikora, Axel (Hrsg.):
Communication Technologies for Vehicles. 6th International Workshop, Nets4Cars/Nets4Trains/Nets4Aircraft 2014 : Offenburg, Germany, May 6-7, 2014. Proceedings
Cham: Springer International Publishing, 2014 (Lecture Notes in Computer Science 8435)
ISBN: 978-3-319-06643-1 (Print)
ISBN: 978-3-319-06644-8 (Online)
International Workshop Nets4Cars/Nets4Trains/Nets4Aircraft <6, 2014, Offenburg>
Conference Paper, Electronic Publication
Fraunhofer ESK ()
automotive connectivity; automotive bus; automotive bus system; Keccak; HMAC; security; CAN; FlexRay; LIN; MOST; HOTP

A number of successful attacks on automotive bus systems has been published recently. However, only a limited amount of detailed studies about attack surfaces as well as efficient security mechanisms have been proposed. Therefore, a general study of possible attacks regarding content manipulation on popular automotive bus systems is provided in this work. Additionally, a new authentication scheme for bus messages is proposed, which overcomes some of the limitations imposed by previously suggested technologies. Thereby, a combination of the upcoming SHA-3 standard with standard HMAC authentication is used to achieve a highly secure system, while keeping the introduced overhead very low.