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题名:
cryptanalysis of a generalized unbalanced feistel network structure
作者: Li Ruilin ; Sun Bing ; Li Chao ; Qu Longjiang
会议文集: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
会议名称: 15th Australasian Conference on Information Security and Privacy, ACISP 2010
会议日期: 44017
出版日期: 2010
会议地点: Sydney, NSW, Australia
关键词: Algebra ; Cryptography ; Lyapunov methods
出版地: Germany
收录类别: EI
ISSN: 3029743
ISBN: 3642140807
部门归属: (1) Department of Mathematics and System Science, Science College, National University of Defense Technology, Changsha, 410073, China; (2) State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China; (3) National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China
主办者: iRobot
英文摘要: This paper reevaluates the security of GF-NLFSR, a new kind of generalized unbalanced Feistel network structure that was proposed at ACISP 2009. We show that GF-NLFSR itself reveals a very slow diffusion rate, which could lead to several distinguishing attacks. For GF-NLFSR containing n sub-blocks, we find an n2-round integral distinguisher by algebraic methods and further use this integral to construct an (n2+n-2)-round impossible differential distinguisher. Compared with the original (3n-1)-round integral and (2n-1)-round impossible differential, ours are significantly better. Another contribution of this paper is to introduce a kind of non-surjective attack by analyzing a variant structure of GF-NLFSR, whose provable security against differential and linear cryptanalysis can also be provided. The advantage of the proposed non-surjective attack is that traditional non-surjective attack is only applicable to Feistel ciphers with non-surjective (non-uniform) round functions, while ours could be applied to block ciphers with bijective ones. Moreover, its data complexity is O(l) with l the block length. © 2010 Springer-Verlag.
语种: 英语
内容类型: 会议论文
URI标识: http://ir.iscas.ac.cn/handle/311060/8714
Appears in Collections:互联网软件技术实验室 _会议论文

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Recommended Citation:
Li Ruilin,Sun Bing,Li Chao,et al. cryptanalysis of a generalized unbalanced feistel network structure[C]. 见:15th Australasian Conference on Information Security and Privacy, ACISP 2010. Sydney, NSW, Australia. 44017.
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