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An algebraic approach to fix points of GOST-algorithm. (English) Zbl 1004.68065
Assuming a special case with the zero key, and all S-boxes being identity mappings, there is a nice algebraic method for finding all weak keys. Moreover, this method is applicable not only for 11 bits rotation but for any possible rotation in GOST round function. To what extent this method is applicable to arbitrary Feistel-like cryptosystem is not clear from the paper.

##### MSC:
 68P25 Data encryption (aspects in computer science) 94A60 Cryptography
##### Keywords:
GOST; fix point; cryptanalysis
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##### References:
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