Cryptology ePrint Archive: Report 2015/161

Exploring the Resilience of Some Lightweight Ciphers Against Profiled Single Trace Attacks

Valentina Banciu and Elisabeth Oswald and Carolyn Whitnall

Abstract: This paper compares attack outcomes w.r.t. profiled single trace attacks of four different lightweight ciphers in order to investigate which of their properties, if any, contribute to attack success. We show that mainly the diffusion properties of both the round function and the key schedule play a role. In particular, the more (reasonably statistically independent) intermediate values are produced in a target implementation, the better attacks succeed. A crucial aspect for lightweight ciphers is hence the key schedule which is often designed to be particularly light. This design choice implies that information from all round keys can be easily combined which results in attacks that succeed with ease.

Category / Keywords: applications / side-channel analysis, power analysis, single trace attacks, lightweight block ciphers

Original Publication (in the same form): COSADE 2015

Date: received 25 Feb 2015, last revised 4 Feb 2016

Contact author: valentina banciu at bristol ac uk, carolyn whitnall at bristol ac uk

Available format(s): PDF | BibTeX Citation

Note: This article is the final version submitted by the authors to Springer-Verlag.

Version: 20160204:153549 (All versions of this report)

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