RFC 9858
Additional Parameter Sets for HSS/LMS Hash-Based Signatures, October 2025
- File formats:

- Also available: XML file for editing
- Status:
- INFORMATIONAL
- Authors:
- S. Fluhrer
Q. Dang - Stream:
- IRTF
Cite this RFC: TXT | XML | BibTeX
DOI: https://doi.org/10.17487/RFC9858
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Abstract
This document extends HSS/LMS (RFC 8554) by defining parameter sets that use alternative hash functions. These include hash functions that result in signatures with significantly smaller sizes than the signatures that use the RFC 8554 parameter sets and should have sufficient security.
This document is a product of the Internet Research Task Force (IRTF). The IRTF publishes the results of Internet-related research and development activities. These results might not be suitable for deployment. This RFC represents the consensus of the Crypto Forum Research Group of the Internet Research Task Force (IRTF). Documents approved for publication by the IRSG are not candidates for any level of Internet Standard; see Section 2 of RFC 7841.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.