Paper 2017/645
SPHINCS-Simpira: Fast Stateless Hash-based Signatures with Post-quantum Security
Shay Gueron and Nicky Mouha
Abstract
We introduce SPHINCS-Simpira, which is a variant of the SPHINCS signature scheme with Simpira as a building block. SPHINCS was proposed by Bernstein et al. at EUROCRYPT 2015 as a hash-based signature scheme with post-quantum security. At ASIACRYPT 2016, Gueron and Mouha introduced the Simpira family of cryptographic permutations, which delivers high throughput on modern 64-bit processors by using only one building block: the AES round function. The Simpira family claims security against structural distinguishers with a complexity up to 2^128 using classical computers. In this document, we explain why the same claim can be made against quantum computers as well. Although Simpira follows a very conservative design strategy, our benchmarks show that SPHINCS-Simpira provides a 1.5x speed-up for key generation, a 1.4x speed-up for signing 59-byte messages, and a 2.0x speed-up for verifying 59-byte messages compared to the originally proposed SPHINCS-256.
Metadata
- Available format(s)
-
PDF
- Category
- Implementation
- Publication info
- Preprint. MINOR revision.
- Keywords
- SimpiraSPHINCSpost-quantum securityhash-based signatureAES-NI
- Contact author(s)
- nicky @ mouha be
- History
- 2017-07-05: received
- Short URL
- https://ia.cr/2017/645
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2017/645,
author = {Shay Gueron and Nicky Mouha},
title = {{SPHINCS}-Simpira: Fast Stateless Hash-based Signatures with Post-quantum Security},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/645},
year = {2017},
url = {https://eprint.iacr.org/2017/645}
}
