The Impact of Hash Primitives and Communication Overhead for Hardware-Accelerated SPHINCS+

Patrick Karl; Jonas Schupp; Georg Sigl

Paper 2023/1767

The Impact of Hash Primitives and Communication Overhead for Hardware-Accelerated SPHINCS+

Patrick Karl

, Technical University of Munich

Jonas Schupp

, Technical University of Munich

Georg Sigl

, Technical University of Munich, Fraunhofer Institute for Applied and Integrated Security

Abstract

SPHINCS+ is a signature scheme included in the first NIST post-quantum standard, that bases its security on the underlying hash primitive. As most of the runtime of SPHINCS+ is caused by the evaluation of several hash- and pseudo-random functions, instantiated via the hash primitive, offloading this computation to dedicated hardware accelerators is a natural step. In this work, we evaluate different architectures for hardware acceleration of such a hash primitive with respect to its use-case and evaluate them in the context of SPHINCS+. We attach hardware accelerators for different hash primitives (SHAKE256 and Asconxof for both full and round-reduced versions) to CPU interfaces having different transfer speeds. We show, that for most use-cases, data transfer determines the overall performance if accelerators are equipped with FIFOs.

Note: This paper was published at COSADE 2024.

Metadata

Available format(s): PDF
Category: Implementation
Publication info: Published elsewhere. Minor revision. COSADE 2024
DOI: 10.1007/978-3-031-57543-3_12
Keywords: SPHINCS+PQC post-quantum cryptography hardware acceleration Ascon
Contact author(s): patrick karl @ tum de
jonas schupp @ tum de
sigl @ tum de
History: 2024-04-04: revised; 2023-11-15: received; See all versions
Short URL: https://ia.cr/2023/1767
License: CC BY

BibTeX

@misc{cryptoeprint:2023/1767,
      author = {Patrick Karl and Jonas Schupp and Georg Sigl},
      title = {The Impact of Hash Primitives and Communication Overhead for Hardware-Accelerated {SPHINCS}+},
      howpublished = {Cryptology {ePrint} Archive, Paper 2023/1767},
      year = {2023},
      doi = {10.1007/978-3-031-57543-3_12},
      url = {https://eprint.iacr.org/2023/1767}
}