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Integral Property Analysis on the Structure of SP-GFS |
Li Yan-jun① Wu Wen-ling② Zheng Xiu-lin① |
①(Department of Information Security, Beijing Electronic Science and Technology Institute, Beijing 100070, China)
②(Institute of Software, Chinese Academy of Sciences, Beijing 100190, China) |
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Abstract The paper propose the definition of diffusion order and described the diffusion property of the linear permutation. Moreover, by analyzing effect of the linear permutation on the integral distinguisher length, the lower bounds for the round number of the Substitute Permutation-Generalized Feistel Structure (SP-GFS) integral distinguisher with different linear permutations P are obtained. Using this method,the integral distinguishers of two block ciphers Camellia and CLEFIA are improved, hence verifying the correctness of the conclusion.
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Received: 14 October 2013
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Corresponding Authors:
Li Yan-jun
E-mail: liyjwuyh@163.com
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