Cryptology ePrint Archive: Report 2006/468

White Box Cryptography: Another Attempt

Julien Bringer and Herve Chabanne and Emmanuelle Dottax

Abstract: At CMS 2006 Bringer et al. show how to conceal the algebraic structure of a ``traceable block cipher'' by adding perturbations to its description. We here exploit and strengthen their ideas by further perturbing the representation of a cipher towards a white box implementation. Our technique is quite general, and we apply it -- as a challenging example in the domain of white box cryptography -- to a variant of the block cipher AES.

Category / Keywords: implementation / white box cryptography, obfuscation, perturbations, AES

Date: received 11 Dec 2006, last revised 20 Dec 2006

Contact author: julien bringer at sagem com

Available format(s): PDF | BibTeX Citation

Note: Our previous attempt has been published on the eprint the 11th of December, 2006. Jean-Sebastien Coron pointed out an attack of this previous version to us in [8].

Version: 20061220:083203 (All versions of this report)

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