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Title:
Improved multidimensional zero-correlation linear cryptanalysis and applications to LBlock and TWINE
Author: Wang, Yanfeng (1) ; Wu, Wenling (1)
Conference Name: 19th Australasian Conference on Information Security and Privacy, ACISP 2014
Conference Date: July 7, 2014 - July 9, 2014
Issued Date: 2014
Conference Place: Wollongong, NSW, Australia
Publish Place: Springer Verlag
Indexed Type: EI
ISSN: 3029743
ISBN: 9783319083438
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, Chinese Academy of Sciences, Beijing 100049, China
Abstract: Zero-correlation linear cryptanalysis is a new method based on the linear approximations with correlation zero. In this paper, we propose a new model of multidimensional zero-correlation linear cryptanalysis by taking the equivalent relations of round keys into consideration. The improved attack model first finds out all the longest multidimensional zero-correlation linear distinguishers, then regards the distinguishers with the least independent guessed keys as the optimal distinguishers and finally chooses one optimal distinguisher to recover the secret key of cipher by using the partial-compression technique. Based on the improved attack model, we extend the original 22-round zero-correlation linear attack on LBlock and first evaluate the security of TWINE against the zero-correlation linear cryptanalysis. There are at least 8×8 classes of multidimensional zero-correlation linear distinguishers for 14-round LBlock and TWINE. After determining the corresponding optimal distinguisher, we carefully choose the order of guessing keys and guess each subkey nibble one after another to achieve an attack on 23-round LBlock, an attack on 23-round TWINE-80 and another attack on 25-round TWINE-128. As far as we know, these results are the currently best results on LBlock and TWINE in the single key scenario except the optimized brute force attack. © 2014 Springer International Publishing Switzerland.
English Abstract: Zero-correlation linear cryptanalysis is a new method based on the linear approximations with correlation zero. In this paper, we propose a new model of multidimensional zero-correlation linear cryptanalysis by taking the equivalent relations of round keys into consideration. The improved attack model first finds out all the longest multidimensional zero-correlation linear distinguishers, then regards the distinguishers with the least independent guessed keys as the optimal distinguishers and finally chooses one optimal distinguisher to recover the secret key of cipher by using the partial-compression technique. Based on the improved attack model, we extend the original 22-round zero-correlation linear attack on LBlock and first evaluate the security of TWINE against the zero-correlation linear cryptanalysis. There are at least 8×8 classes of multidimensional zero-correlation linear distinguishers for 14-round LBlock and TWINE. After determining the corresponding optimal distinguisher, we carefully choose the order of guessing keys and guess each subkey nibble one after another to achieve an attack on 23-round LBlock, an attack on 23-round TWINE-80 and another attack on 25-round TWINE-128. As far as we know, these results are the currently best results on LBlock and TWINE in the single key scenario except the optimized brute force attack. © 2014 Springer International Publishing Switzerland.
Language: 英语
Content Type: 会议论文
URI: http://ir.iscas.ac.cn/handle/311060/16619
Appears in Collections:软件所图书馆_会议论文

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Recommended Citation:
Wang, Yanfeng ,Wu, Wenling . Improved multidimensional zero-correlation linear cryptanalysis and applications to LBlock and TWINE[C]. 见:19th Australasian Conference on Information Security and Privacy, ACISP 2014. Wollongong, NSW, Australia. July 7, 2014 - July 9, 2014.
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