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IJNSEC
2006

Security on Generalized Feistel Scheme with SP Round Function

13 years 11 months ago
Security on Generalized Feistel Scheme with SP Round Function
This paper studies the security against differential/linear cryptanalysis and the pseudorandomness for a class of generalized Feistel scheme with SP round function called GFSP. We consider the minimum number of active s-boxes in some consecutive rounds of GFSP,i.e., in four, eight and sixteen consecutive rounds, which provide the upper bound of the maximum differential/linear probabilities of 16-round GFSP scheme, in order to evaluate the strength against differential/linear cryptanalysis. Furthermore, We investigate the pseudorandomness of GFSP, point out 7-round GFSP is not pseudorandom for non-adaptive adversary, by using some distinguishers, and prove that 8-round GFSP is pseudorandom for any adversaries. Key words: Differential cryptanalysis, Linear cryptanalysis, Branch number, Cipher, S-box, Pseudorandomness.
Wenling Wu, Wentao Zhang, Dongdai Lin
Added 12 Dec 2010
Updated 12 Dec 2010
Type Journal
Year 2006
Where IJNSEC
Authors Wenling Wu, Wentao Zhang, Dongdai Lin
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