Hi,
This NIST SP800-230 spec updates with optimized parameter sets (i.e.,
faster execution)
for FIPS 205 (SLH-DSA) with tradeoffs of less total signatures (still very
useful for things
like firmware updates).
This is the initial public draft. It's likely that the next release will
be the final standard.
Cheers,
- Ira
---------- Forwarded message ---------
From: 'dustin... at nist.gov' via pqc-forum <pqc-forum at list.nist.gov>
Date: Mon, Apr 13, 2026 at 11:22 AM
Subject: [pqc-forum] Call for comments: ipd SP 800-230: Additional SLH-DSA
Parameter Sets for Limited Signature Use Cases
To: pqc-forum <pqc-forum at list.nist.gov>
All,
NIST is seeking public comments on the initial public draft (ipd) of Special
Publication (SP) 800-230, *Additional SLH-DSA Parameter Sets for
Limited-Signature Use Cases* <https://csrc.nist.gov/pubs/sp/800/230/ipd>.
This document serves as a technical extension to FIPS 205
<https://csrc.nist.gov/pubs/fips/205/final> by specifying six additional
parameter sets for security levels 1, 3, and 5. These variants are
specifically tailored for use cases that require fast verification and
reduced signature sizes, such as the signing of software, firmware, and
digital certificates. These optimizations are achieved by establishing a
strict limit of 2^24 signatures per signing key; therefore, these sets are
not approved for general-purpose use.
NIST requests feedback on the suitability of these additional parameter
sets, specifically asking reviewers to identify applications for which
these variants might incur unacceptable performance or to suggest
alternative sets that are better suited for such use cases. Users must
perform a thorough evaluation to ensure that the signature limit is never
exceeded during a key's lifetime. Please submit comments to
SP800-230-comments at nist.gov by June 12, 2026.
See: https://csrc.nist.gov/pubs/sp/800/230/ipd
Dustin Moody
NIST PQC
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