weak keys of the full misty1 block cipher for related-key differential cryptanalysis

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	weak keys of the full misty1 block cipher for related-key differential cryptanalysis
	Lu Jiqiang ; Yap Wun-She ; Wei Yongzhuang
	2013
会议名称	Cryptographers' Track at the RSA Conference 2013, CT-RSA 2013
会议日期	February 25, 2013 - March 1, 2013
会议地点	San Francisco, CA, United states
关键词	Lyapunov methods Security of data
页码	389-404
中文摘要	The MISTY1 block cipher has a 64-bit block length, a 128-bit user key and a recommended number of 8 rounds. It is a Japanese CRYPTREC-recommended e-government cipher, a European NESSIE selected cipher, and an ISO international standard. Despite of considerable cryptanalytic efforts during the past fifteen years, there has been no published cryptanalytic attack on the full MISTY1 cipher algorithm. In this paper, we present a related-key differential attack on the full MISTY1 under certain weak key assumptions: We describe 2 ^103.57 weak keys and a related-key differential attack on the full MISTY1 with a data complexity of 2⁶¹ chosen ciphertexts and a time complexity of 2^90.93 encryptions. For the first time, our result exhibits a cryptographic weakness in the full MISTY1 cipher (when used with the recommended 8 rounds), and shows that the MISTY1 cipher is distinguishable from an ideal cipher and thus cannot be regarded to be an ideal cipher. © 2013 Springer-Verlag.
英文摘要	The MISTY1 block cipher has a 64-bit block length, a 128-bit user key and a recommended number of 8 rounds. It is a Japanese CRYPTREC-recommended e-government cipher, a European NESSIE selected cipher, and an ISO international standard. Despite of considerable cryptanalytic efforts during the past fifteen years, there has been no published cryptanalytic attack on the full MISTY1 cipher algorithm. In this paper, we present a related-key differential attack on the full MISTY1 under certain weak key assumptions: We describe 2 ^103.57 weak keys and a related-key differential attack on the full MISTY1 with a data complexity of 2⁶¹ chosen ciphertexts and a time complexity of 2^90.93 encryptions. For the first time, our result exhibits a cryptographic weakness in the full MISTY1 cipher (when used with the recommended 8 rounds), and shows that the MISTY1 cipher is distinguishable from an ideal cipher and thus cannot be regarded to be an ideal cipher. © 2013 Springer-Verlag.
收录类别	EI
会议录	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
语种	英语
ISSN号	0302-9743
ISBN号	9783642360947
内容类型	会议论文
源URL	[http://ir.iscas.ac.cn/handle/311060/15898]
专题	软件研究所_软件所图书馆_会议论文
推荐引用方式 GB/T 7714	Lu Jiqiang,Yap Wun-She,Wei Yongzhuang. weak keys of the full misty1 block cipher for related-key differential cryptanalysis[C]. 见:Cryptographers' Track at the RSA Conference 2013, CT-RSA 2013. San Francisco, CA, United states. February 25, 2013 - March 1, 2013.