Dial C for Cipher

We introduce C, a practical provably secure block cipher with a slow key schedule. C is based on the same structure as AES but uses independent random substitution boxes instead of a fixed one. Its key schedule is based on the Blum-Blum-Shub pseudo-random generator, which allows us to prove that all obtained security results are still valid when taking into account the dependencies between the round keys. C is provably secure against several general classes of attacks. Strong evidence is given that it resists an even wider variety of attacks. We also propose a variant of C with simpler substitution boxes which is suitable for most applications, and for which security proofs still hold.


Published in:
13th Annual Workshop on Selected Areas in Cryptography - SAC 2006, 76-95
Presented at:
13th Annual Workshop on Selected Areas in Cryptography - SAC 2006, Concordia University, Montreal, Quebec, Canada, August 17 and 18, 2006
Year:
2007
Publisher:
Berlin, Springer
ISBN:
978-3-540-74461-0
Keywords:
Laboratories:




 Record created 2006-10-05, last modified 2018-03-17

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