NDLI: Exploiting small leakages in masks to turn a second-order attack into a first-order attack

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Content Provider	ACM Digital Library
Author	DeTrano, Alexander Karimi, Naghmeh Guo, Xiaofei Karri, Ramesh Guilley, Sylvain
Abstract	Masking countermeasures, used to thwart side-channel attacks, have been shown to be vulnerable to mask-extraction attacks. State-of-the-art mask-extraction attacks on the Advanced Encryption Standard (AES) algorithm target S-Box re-computation schemes, but have not been applied to scenarios where S-Boxes are precomputed offline. We propose an attack targeting precomputed S-Boxes stored in nonvolatile memory. Our attack targets AES implemented in software protected by a low entropy masking scheme and recovers the masks with 91% success rate. Recovering the secret key requires fewer power traces (in fact, by at least two orders of magnitude) compared to a classical second order attack. Moreover, we show that this attack remains viable in a noisy environment, or with a reduced number of leakage points.
Starting Page	1
Ending Page	5
Page Count	5
File Format	PDF
ISBN	9781450334839
DOI	10.1145/2768566.2768573
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2015-06-14
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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Exploiting small leakages in masks to turn a second-order attack into a first-order attack