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TitleObtaining and solving systems of equations in key variables only for the small variants of AES.
Author(s) Michael Brickenstein, Stanislav Bulygin
TypeArticle in Journal
AbstractThis work is devoted to attacking the small scale variants of the Advanced Encryption Standard (AES) via systems that contain only the initial key variables. To this end, we investigate a system of equations that naturally arises in the AES, and then introduce an elimination of all the intermediate variables via normal form reductions. The resulting system in key variables only is solved then. We also consider a possibility to apply our method in the meet-in-the-middle scenario especially with several plaintext/ciphertext pairs. We elaborate on the method further by looking for subsystems which contain fewer variables and are overdetermined, thus facilitating solving the large system.
KeywordsAlgebraic attack, Meet-in-the-middle attack, AES, Gröbner basis, Normal form
ISSN1661-8270; 1661-8289/e
URL http://link.springer.com/article/10.1007%2Fs11786-009-0020-y
JournalMath. Comput. Sci.
PublisherSpringer (Birkh\"auser), Basel
Translation No
Refereed No