On MISTY1 Higher Order Differential Cryptanalysis
ICISC '00 Proceedings of the Third International Conference on Information Security and Cryptology
ASIACRYPT '92 Proceedings of the Workshop on the Theory and Application of Cryptographic Techniques: Advances in Cryptology
Cryptanalysis of Reduced-Round MISTY
EUROCRYPT '01 Proceedings of the International Conference on the Theory and Application of Cryptographic Techniques: Advances in Cryptology
New Block Encryption Algorithm MISTY
FSE '97 Proceedings of the 4th International Workshop on Fast Software Encryption
Amplified Boomerang Attacks Against Reduced-Round MARS and Serpent
FSE '00 Proceedings of the 7th International Workshop on Fast Software Encryption
Improved Cryptanalysis of MISTY1
FSE '02 Revised Papers from the 9th International Workshop on Fast Software Encryption
FSE '02 Revised Papers from the 9th International Workshop on Fast Software Encryption
An Improved Impossible Differential Attack on MISTY1
ASIACRYPT '08 Proceedings of the 14th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Weak-Key Classes of 7-Round MISTY 1 and 2 for Related-Key Amplified Boomerang Attacks
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Higher Order Differential Attacks on Reduced-Round MISTY1
Information Security and Cryptology --- ICISC 2008
WISA'07 Proceedings of the 8th international conference on Information security applications
Improving the efficiency of impossible differential cryptanalysis of reduced Camellia and MISTY1
CT-RSA'08 Proceedings of the 2008 The Cryptopgraphers' Track at the RSA conference on Topics in cryptology
Weak keys of the full MISTY1 block cipher for related-key differential cryptanalysis
CT-RSA'13 Proceedings of the 13th international conference on Topics in Cryptology
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MISTY1 is a Feistel block cipher with presence in many cryptographic standards and applications. In this paper, according to analyzing the key schedule algorithm, a weak-key class encompassing 2102.57 weak keys of MISTY1 is found. Then we present 7-round related-key differential characteristics of MISTY1 under the weak-key class, which lead to the attacks on the 8-round MISTY1 without the first FL lay. The attack requires 261 chosen ciphertexts, and the time complexities is 284.6. To the best of our knowledge, the attack reported in this paper is the most powerful attack against MISTY1 with two related keys.