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New Parameter Sets for SPHINCS+
Jinwoo LEE Tae Gu KANG Kookrae CHO Dae Hyun YUM
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2021/06/01
Online ISSN: 1745-1361
Type of Manuscript: LETTER
Category: Information Network
post-quantum cryptography, hash based signatures, SPHINCS, SPHINCS+, parameters,
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SPHINCS+ is a state-of-the-art post-quantum hash-based signature that is a candidate for the NIST post-quantum cryptography standard. For a target bit security, SPHINCS+ supports many different tradeoffs between the signature size and the signing speed. SPHINCS+ provides 6 parameter sets: 3 parameter sets for size optimization and 3 parameter sets for speed optimization. We propose new parameter sets with better performance. Specifically, SPHINCS+ implementations with our parameter sets are up to 26.5% faster with slightly shorter signature sizes.