Related-Key Impossible Differential Attacks on Reduced-Round AES-256
نویسندگان
چکیده
In this paper we examine the strength of AES-256 against the related-key impossible differential attack, following the work in [1] and [2]. Firstly, we present a carefully chosen relation between the related keys, which can be extended to 8-round(even more rounds) subkey differences. Then, we construct a 5.5-round related-key impossible differential. Using the differential, we present an attack on 7-round AES-256 and four attacks on 8-round AES-256.
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