Cryptology ePrint Archive: Report 2014/952

Balanced Encoding to Mitigate Power Analysis: A Case Study

Cong Chen and Thomas Eisenbarth and Aria Shahverdi and Xin Ye

Abstract: Most side channel countermeasures for software implementations of cryptography either rely on masking or randomize the execution order of the cryptographic implementation. This work proposes a countermeasure that has constant leakage in common linear leakage models. Constant leakage is achieved not only for internal state values, but also for their transitions. The proposed countermeasure provides perfect protection in the theoretical leakage model. To study the practical relevance of the proposed countermeasure, it is applied to a software implementation of the block cipher Prince. This case study allows us to give realistic values for resulting implementation overheads as well as for the resulting side channel protection levels that can be achieved in realistic implementation scenarios.

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Original Publication (in the same form): CARDIS 2014

Date: received 20 Nov 2014

Contact author: cchen3 at wpi edu

Available format(s): PDF | BibTeX Citation

Version: 20141121:072458 (All versions of this report)

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