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The rectangle attack – rectangling the Serpent. (English) Zbl 0981.94017

Pfitzmann, Birgit (ed.), Advances in cryptology - EUROCRYPT 2001. 20th international conference on theory and application of cryptographic techniques, Innsbruck, Austria, May 6-10, 2001. Proceedings. Berlin: Springer. Lect. Notes Comput. Sci. 2045, 340-357 (2001).
Summary: Serpent is one of the 5 AES finalists. The best attack published so far analyzes up to 9 rounds. In this paper we present attacks on 7-round, 8-round, and 10-round variants of Serpent. We attack a 7-round variant with all key lengths, and 8- and 10-round variants with 256-bit keys. The 10-round attack on the 256-bit keys variants is the best published attack on the cipher. The attack enhances the amplified boomerang attack and uses better differentials. We also present the best 3-round, 4-round, 5-round and 6-round differential characteristics of Serpent.
For the entire collection see [Zbl 0961.00037].

MSC:

94A60 Cryptography
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