Article

Article title USING OF WEAK BLOCKS OF REPLACEMENT FOR LINEAR CRYPTOANALYSIS OF BLOCK CIPHERS
Authors L.K. Babenko, E.A. Ischukova
Section SECTION IV. METHODS AND MEANS OF CRYPTOGRAPHY AND STEGANOGRAPHY
Month, Year 02, 2014 @en
Index UDC 681.03.245
DOI
Abstract This work is further work on research of influence of used weak S-blocks on possibility of carrying out attack by means of a method of linear cryptoanalysis for algorithm of enciphering of GOST 28147-89. Earlier authors of article developed universal algorithm of search of replacement blocks weakened in relation to a method of linear cryptoanalysis. In the given work the main approaches which allow to receive the most effective linear analogs for algorithm of enciphering of GOST 28147-89 are considered. It is shown that, creation of analogs is carried out rather simply and can have various options of construction. Further research in this field will be directed on a solution of the problem of fast construction of linear analog using various sets of S-blocks. And also on a complex assessment of strength of GOST enciphering algorithm and other block codes low-studied in relation to a method of linear cryptoanalysis.

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Keywords GOST; S-Box; secret key; linear cryptanalysis; probability.
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