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STANDARD_WORKSPACE
Technical_Record_v4.2
ID: 0xSPHINC

SLH-DSA SIGNATURE SPEC

Stateless hash-based signatures (FIPS 205) for cold-path identity and archive integrity.

OVERVIEW

Hot-path transaction signing uses ML-DSA-87 (FIPS 204). SLH-DSA (FIPS 205) — standardized from SPHINCS+ — is the conservative hash-based option for selected identity keys, governance mandates, and archive proofs.

MATHEMATICAL FOUNDATION

SLH-DSA inherits the SPHINCS+ design (WOTS+/FORS multi-tree constructions). Security is based on the collision resistance of the underlying hash function (SHAKE-256 by default in common profiles).

USAGE IN ZEQRON

  • ::COLD_PATH_IDENTITY: Selected DIDs and high-assurance mandates may use SLH-DSA.
  • ::ARCHIVE_SNAPSHOTS: Long-lived snapshots can be attested with SLH-DSA for hash-based assurance.
  • ::STATUS: Designed and implemented in the internal crypto stack; not a public network service claim.

Technical Specification // Cryptography Lab — Draft

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