Cryptochallenge 11
نویسنده
چکیده
Abstract In this short report we present an efficient attack of the C cryptosystem based on fast algorithms for computing Grbner basis. The attack consists in computing a Grbner basis of the public key. The efficiency of this attack depends strongly on the choice of the algorithm for computing the Grbner basis: it was was possible to break the crypto-challenge 11 in only 3 hours and 11 minutes of CPU time (PC Pentium 2.8 Ghz Xeon) by using the algorithm F5 implemented in C. We recommend to increase the value of n ≥ 26.
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