%0 Electronic Article %A Jiqiang Lu %A Wun-She Yap %A Yongzhuang Wei %K cryptographic weakness %K data complexity %K related-key amplified boomerang cryptanalysis %K ISO international standard %K 287.33 encryptions %K Japanese CRYPTREC-recommended e-government cipher %K master key %K block size %K European NESSIE selected cipher %K time complexity %K 290 weak keys %K 260.5 chosen plaintexts %K full MISTY1 block cipher %X 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. %@ 1751-8709 %T Weak keys of the full MISTY1 block cipher for related-key amplified boomerang cryptanalysis %B IET Information Security %D September 2018 %V 12 %N 5 %P 389-397 %I Institution of Engineering and Technology %U https://digital-library.theiet.org/;jsessionid=e3sm79m5pmp36.x-iet-live-01content/journals/10.1049/iet-ifs.2017.0173 %G EN