Weak keys of the full MISTY1 block cipher for related-key amplified boomerang cryptanalysis
Weak keys of the full MISTY1 block cipher for related-key amplified boomerang cryptanalysis
复制标题
用于相关密钥放大回旋镖密码分析的完整 MISTY1 分组密码的弱密钥
DOI:
10.1049/iet-ifs.2017.0173
复制
发表时间:
2018-01
影响因子:
1.4
通讯作者:
Yongzhuang Wei
中科院分区:
文献类型:
--
作者:
Jiqiang Lu;Wun She Yap;Yongzhuang Wei
The MISTY1 block cipher has a 64-bit block size, a 128-bit master key, and a total of 8 rounds. It is an ISO international standard, a Japanese CRYPTREC-recommended e-government cipher, and a European NESSIE selected cipher. In this study, the authors show another cryptographic weakness of the full MISTY1 cipher: they describe four classes of 2 90 weak keys of the full MISTY1 cipher for a related-key amplified boomerang attack that has a data complexity of 2 60.5 chosen plaintexts and a time complexity of 2 87.33 encryptions under each class of weak keys. The result shows that the MISTY1 cipher can be distinguishable from an ideal cipher in terms of related-key amplified boomerang cryptanalysis, and users should be very careful when using MISTY1 for a full security in relevant application situations.
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2005-12
期刊:
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