Study on Weak-Key Classes for KeeLoq

Vol. 19, No. 1, pp. 25-32, Feb. 2009
10.13089/JKIISC.2009.19.1.25, Full Text:
Keywords: block cipher, KeeLoq, weak-key attack, cryptanalysis
Abstract

KeeLoq is a very light block cipher with a 32-bit block and a 64-bit key. It is suitable for the wireless applications, and thus multiple automotive OEMs as Chrysler, GM, Honda, Toyota have used remote keyless entry systems and alarm systems in order to protect the their cars. In this paper, we introduce various weak-key classes that include $2^1{\sim}2^{32}$ keys and exploit the slide attack to propose key-recovery attacks under these weak-key classes.

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Cite this article
[IEEE Style]
Y. Lee, J. Kim, S. Hong, "Study on Weak-Key Classes for KeeLoq," Journal of The Korea Institute of Information Security and Cryptology, vol. 19, no. 1, pp. 25-32, 2009. DOI: 10.13089/JKIISC.2009.19.1.25.

[ACM Style]
Yu-Seop Lee, Jong-Sung Kim, and Seok-Hie Hong. 2009. Study on Weak-Key Classes for KeeLoq. Journal of The Korea Institute of Information Security and Cryptology, 19, 1, (2009), 25-32. DOI: 10.13089/JKIISC.2009.19.1.25.