Encasing block ciphers to foil key recovery attempts via side channel

Providing efficient protection against energy consumption based side channel attacks (SCAs) for block ciphers is a relevant topic for the research community, as current overheads are in the 100× range. Unprofiled SCAs exploit information leakage from the outmost rounds of a cipher; we propose a solu...

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Bibliographic Details
Main Authors: Agosta, Giovanni, Barenghi, Alessandro, Pelosi, Gerardo, Scandale, Michele
Format: Conference Proceeding
Language:English
Subjects:
Ciphers
Compiler Techniques
Computational modeling
Embedded Systems Security
Energy consumption
Hamming weight
Side Channel Attacks
Software
Software Countermeasures
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Summary:Providing efficient protection against energy consumption based side channel attacks (SCAs) for block ciphers is a relevant topic for the research community, as current overheads are in the 100× range. Unprofiled SCAs exploit information leakage from the outmost rounds of a cipher; we propose a solution encasing it between keyed transformations amenable to an efficient SCA protection. Our solution can be employed as a drop in replacement for an unprotected implementation, or be retrofit to an existing one, while retaining communication capabilities with legacy insecure endpoints. Experiments on a Cortex-M4 μC, show performance improvements in the range of 60×, compared with available solutions.
ISSN:1558-2434
DOI:10.1145/2966986.2967033