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Title:
Differential cryptanalysis and linear distinguisher of full-round Zorro
Author: Wang, Yanfeng (1) ; Wu, Wenling (1) ; Guo, Zhiyuan (1) ; Yu, Xiaoli (1)
Conference Name: 12th International Conference on Applied Cryptography and Network Security, ACNS 2014
Conference Date: June 10, 2014 - June 13, 2014
Issued Date: 2014
Conference Place: Lausanne, Switzerland
Keyword: Zorro ; block cipher ; differential cryptanalysis ; linear distinguisher
Publish Place: Springer Verlag
Indexed Type: CPCI ; EI
ISSN: 3029743
ISBN: 9783319075358
Department: (1) Trusted Computing and Information Assurance Laboratory, Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China; (2) State Key Laboratory of Computer Science, Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China; (3) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
Abstract: Zorro is an AES-like lightweight block cipher proposed in CHES 2013, which only uses 4 S-boxes per round. The designers showed the resistance of the cipher against various attacks and concluded the cipher has a large security margin. Recently, Guo et. al [1] have given a key recovery attack on full-round Zorro by using the internal differential characteristics. However, the attack only works for 264 out of 2128 keys. In this paper, the secret key selected randomly from the whole key space can be recovered much faster than the brute-force attack. We first observe that the fourth power of the MDS matrix used in Zorro(or AES) equals to the identity matrix. Moveover, several iterated differential characteristics and iterated linear trails are found due to the interesting property. We select three characteristics with the largest probability to give the key recovery attack on Zorro and a linear trail with the largest correlation to show a linear distinguishing attack with 2 105.3 known plaintexts. The results show that the security of Zorro against linear and differential cryptanalysis evaluated by designers is insufficient and the security margin of Zorro is not enough. © Springer International Publishing Switzerland 2014.
English Abstract: Zorro is an AES-like lightweight block cipher proposed in CHES 2013, which only uses 4 S-boxes per round. The designers showed the resistance of the cipher against various attacks and concluded the cipher has a large security margin. Recently, Guo et. al [1] have given a key recovery attack on full-round Zorro by using the internal differential characteristics. However, the attack only works for 264 out of 2128 keys. In this paper, the secret key selected randomly from the whole key space can be recovered much faster than the brute-force attack. We first observe that the fourth power of the MDS matrix used in Zorro(or AES) equals to the identity matrix. Moveover, several iterated differential characteristics and iterated linear trails are found due to the interesting property. We select three characteristics with the largest probability to give the key recovery attack on Zorro and a linear trail with the largest correlation to show a linear distinguishing attack with 2 105.3 known plaintexts. The results show that the security of Zorro against linear and differential cryptanalysis evaluated by designers is insufficient and the security margin of Zorro is not enough. © Springer International Publishing Switzerland 2014.
Language: 英语
Content Type: 会议论文
URI: http://ir.iscas.ac.cn/handle/311060/16512
Appears in Collections:软件所图书馆_会议论文

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Recommended Citation:
Wang, Yanfeng ,Wu, Wenling ,Guo, Zhiyuan ,et al. Differential cryptanalysis and linear distinguisher of full-round Zorro[C]. 见:12th International Conference on Applied Cryptography and Network Security, ACNS 2014. Lausanne, Switzerland. June 10, 2014 - June 13, 2014.
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