Changyong Peng

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This paper presents the first results on the diffusion properties of KATAN32 [1] Block Cipher accepting a key of 80 bits, a block length of 32 bits and a round number of 254. By using the symbolic computation software Mathematica 7.0, this paper gets the algebraic expressions of the internal state bits of KATAN32 with a reduced round number as the Boolean(More)
NOEKEON is a block cipher having key-size 128 and block size 128,proposed by Daemen, J et al.Shekh Faisal Abdul-Latip et al. give a side channel attack(under the single bit leakage model) on the cipher at ISPEC 2010.Their analysis shows that one can recover the 128-bit key of the cipher, by considering a one-bit information leakage from the internal state(More)
In this paper,we give an example of how symbolic computation are used to analyze the block cipher PRESENT,an ultra-lightweight block cipher proposed by Bogdanov et al. at CHES’07.The block size is 64 bits and the key size can be 80 bit or 128 bit.Using Mathematica 7.0,this paper obtains the unexpanded polynomial expressions of the output of round 1-6 of(More)
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