Welcome to the resource topic for 2023/636
Title:
Multi-Armed SPHINCS+
Authors: Gustavo Banegas, Florian Caullery
Abstract:Hash-based signatures are a type of Digital Signature Algorithms
that are positioned as one of the most solid quantum-resistant
constructions. As an example SPHINCS+, has been selected as a standard
during the NIST Post-Quantum Cryptography competition. However,
hash-based signatures suffer from two main drawbacks: signature
size and slow signing process. In this work, we give a solution to the latter
when it is used in a mobile device. We take advantage of the fact that
hash-based signatures are highly parallelizable. More precisely, we provide
an implementation of SPHINCS+ on the Snapdragon 865 Mobile
Platform taking advantage of its eight CPUs and their vector extensions.
Our implementation shows that it is possible to have a speed-up
of 15 times when compared to a purely sequential and non-vectorized
implementation. Furthermore, we evaluate the performance impact of
side-channel protection using vector extensions in the SPHINCS+ version
based on SHAKE.
ePrint: https://eprint.iacr.org/2023/636
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