2011•Computer Engineering and Applications JournalRequires access
Researches on security of class of block ciphers
Shiwen Wu
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Abstract
To evaluate the security of a class of block ciphers,the security analysis against differential attacks is investigated deeply using enumeration method.If the round function is bijective,then the number of active round function for 3,4,6,9,12, 4r-round ciphers is not less than 1,2,2,4,6,2r respectively.So the upper bounds of maximum differential characteristic probabilities for 3,4,6,9,12,4r-round ciphers are p,p2,p2,p4,p6,p2r if maximum differential probabilities for round function are p.