Cryptology ePrint Archive: Report 2014/474

Cryptographic Schemes Based on the ASASA Structure: Black-box, White-box, and Public-key

Alex Biryukov and Charles Bouillaguet and Dmitry Khovratovich

Abstract: In this paper we pick up an old challenge to design public key or white-box constructions from symmetric cipher components. We design several encryption schemes based on the ASASA structure ranging from fast and generic symmetric ciphers to compact public key and white-box constructions based on generic affine transformations combined with specially designed low degree non-linear layers. While explaining our design process we show several instructive attacks on the weaker variants of our schemes.

Category / Keywords: public-key cryptography / ASASA, multivariate cryptography, white-box cryptography, cryptanalysis, algebraic, symmetric

Date: received 17 Jun 2014

Contact author: alex biryukov at uni lu; dmitry khovratovich@uni lu

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Version: 20140621:162753 (All versions of this report)

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