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LS-Designs: Bitslice Encryption for Efficient Masked Software Implementations

Abstract : Side-channel analysis is an important issue for the security of embedded cryptographic devices, and masking is one of the most in-vestigated solutions to mitigate such attacks. In this context, efficient masking has recently been considered as a possible criteria for new block cipher designs. Previous proposals in this direction were applicable to dif-ferent types of masking schemes (e.g. Boolean and polynomial). In this paper, we study possible optimizations when specializing the designs to Boolean masking. For this purpose, we first observe that bitslice ciphers have interesting properties for improving both the efficiency and the reg-ularity of masked software implementations. Next we specify a family of block ciphers (denoted as LS-designs) that can systematically take ad-vantage of bitslicing in a principled manner. Eventually, we evaluate both the security and performance of such designs and two of their instances, confirming excellent properties for physically secure applications.
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https://hal.inria.fr/hal-01093491
Contributor : Gaëtan Leurent <>
Submitted on : Wednesday, December 10, 2014 - 4:55:39 PM
Last modification on : Friday, May 25, 2018 - 12:02:05 PM
Long-term archiving on: : Saturday, April 15, 2017 - 7:05:32 AM

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  • HAL Id : hal-01093491, version 1

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Vincent Grosso, Gaëtan Leurent, François-Xavier Standaert, Kerem Varıcı. LS-Designs: Bitslice Encryption for Efficient Masked Software Implementations. Fast Software Encryption - FSE 2014, Mar 2014, Londres, United Kingdom. ⟨hal-01093491⟩

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