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Paper: Security on Generalized Feistel Scheme with SP Round Function

Authors:
Wu Wenling
Zhang Wentao
Dongdai Lin
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URL: http://eprint.iacr.org/2004/337
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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.
BibTeX
@misc{eprint-2004-12301,
  title={Security on Generalized Feistel Scheme with SP Round Function},
  booktitle={IACR Eprint archive},
  keywords={secret-key cryptography / block cipher},
  url={http://eprint.iacr.org/2004/337},
  note={ wwl@is.iscas.ac.cn 12752 received 29 Nov 2004},
  author={Wu Wenling and Zhang Wentao and Dongdai Lin},
  year=2004
}