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Lecture Notes in Computer Science
A related-key differential cryptanalysis is applied to the 192bit key variant of AES. Although any 4-round differential trail has at least 25 active bytes, one can construct 5-round related-key differential trail that has only 15 active bytes and break six rounds with 2 106 plaintext/ciphertext pairs and complexity 2 112 . The attack can be improved using truncated differentials. In this case, the number of required plaintext/ciphertext pairs is 2 81 and the complexity is about 2 86 . Usingdoi:10.1007/978-3-540-24654-1_15 fatcat:uwxcheok5rajhj66hb2qsdy5qe