ON THE RELATED-KEY ATTACKS AGAINST AES *
Joan Daemen, Vincent Rijmen · 2012
Alex Biryukov and Dmitry Khovratovich presented related-key attacks on AES and reduced-round versions of AES. The most impressive of these were presented at Asiacrypt 2009: related-key attacks against the full AES-256 and AES-192. We discuss the applicability of these attacks and related-key attacks in general. We model the access of the attacker to the key in the form of key access schemes. Related-key attacks should only be considered with respect to sound key access schemes. We show that defining a sound key access scheme in which the related-key attacks against AES-256 and AES192 can be conducted, is possible, but contrived.