## Cryptology ePrint Archive: Report 2015/832

Characterising and Comparing the Energy Consumption of Side Channel Attack Countermeasures and Lightweight Cryptography on Embedded Devices

David McCann, Kerstin Eder, Elisabeth Oswald

Abstract: This paper uses an Instruction Set Architecture (ISA) based statistical energy model of an ARM Cortex-M4 microprocessor to evaluate the energy consumption of an implementation of AES with different side channel attack (SCA) countermeasures and an implementation of lightweight ciphers PRESENT, KLEIN and ZORRO with and without Boolean first order masking. In this way, we assess the additional energy consumption of using different SCA countermeasures and using lightweight block ciphers on 32 bit embedded devices. In addition to this, we provide a methodology for developing an ISA based energy model for cryptographic software with an accuracy of $\pm5\%$. In addition to providing our methodology for developing this model, we also show that using variations of instructions that reduce the size of code can reduce the energy consumption by as much as $30\%-40\%$ and that memory instructions reduce the predictability of our energy model.

Category / Keywords: implementation / energy, lightweight, masking, hiding, side channels

Original Publication (in the same form): International Workshop on Secure Internet of Things (SIoT 2015)

Date: received 27 Aug 2015, last revised 24 Nov 2015

Contact author: david mccann at bristol ac uk

Available format(s): PDF | BibTeX Citation

Note: Removal of line "no institute given" in heading

Short URL: ia.cr/2015/832

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