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Paper 2004/337

Security on Generalized Feistel Scheme with SP Round Function

Wu Wenling and Zhang Wentao and Lin Dongdai

Abstract

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.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
block cipher
Contact author(s)
wwl @ is iscas ac cn
History
2004-12-02: received
Short URL
https://ia.cr/2004/337
License
Creative Commons Attribution
CC BY
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