Abstract
We report on the experiments we performed in order to assess the security of SHA-1 against the attack by Chabaud and Joux [5]. We present some ideas for optimizations of the attack and some properties of the message expansion routine. Finally, we show that for a reduced version of SHA-1, with 53 rounds instead of 80, it is possible to find collisions in less than 280 operations.
This research was supported financially by the A-SIT, Austria and by the BSI, Germany.
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Rijmen, V., Oswald, E. (2005). Update on SHA-1. In: Menezes, A. (eds) Topics in Cryptology – CT-RSA 2005. CT-RSA 2005. Lecture Notes in Computer Science, vol 3376. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30574-3_6
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DOI: https://doi.org/10.1007/978-3-540-30574-3_6
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