Cryptology ePrint Archive: Report 2010/093

New Impossible DiŽerential Attacks on AES

Zheng Yuan

Abstract: Some new near $5$ rounds impossible differential properties of AES are first presented in this paper, in which active bytes of $1^{st}$ round or $5^{th}$ round are in different columns and in favor of extension. Additionally, we first propose the complexities expressions of an universal impossible differential attack, which can help us to rapidly search appropriate impossible differential paths. More importantly, our near $5$ rounds impossible differential properties and complexities expressions lead to a series of new impossible differential attacks on 7 rounds AES-128, 7-9 rounds AES-192, and 8-12 rounds AES-256.

Category / Keywords: secret-key cryptography / AES, impossible differential properties, Impossible differential attacks

Date: received 21 Feb 2010

Contact author: yuanzheng at besti edu cn;zyuan@mail tsinghua edu cn;sxzyyz5318@163 com

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Version: 20100222:131252 (All versions of this report)

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