Cryptology ePrint Archive: Report 2012/358

PICARO - A Block Cipher Allowing Efficient Higher-Order Side-Channel Resistance -- Extended Version --

Gilles Piret and Thomas Roche and Claude Carlet

Abstract: Many papers deal with the problem of constructing an efficient masking scheme for existing block ciphers. We take the reverse approach: that is, given a proven masking scheme (Rivain and Prouff, CHES 2010) we design a block cipher that fits well the masking constraints. The difficulty of implementing efficient masking for a block cipher comes mainly from the S-boxes. Therefore the choice of an adequate S-box is the first and most critical step of our work. The S-box we selected is non-bijective; we discuss the resulting design and security problems. A complete design of the cipher is given, as well as some implementation results.

Category / Keywords: implementation / block ciphers, side-channel attacks, masking

Publication Info: Extended version of a paper published at ACNS2012

Date: received 22 Jun 2012, last revised 10 Jul 2012

Contact author: gilles piret at gmail com

Available format(s): PDF | BibTeX Citation

Version: 20120710:113852 (All versions of this report)

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