SPHINCS+ SLH-DSA Attestation | HICS-PQ | H33

PQ Library Attestations

Dilithium ML-DSA-65 Kyber ML-KEM-768 FALCON-512 SPHINCS+ SLH-DSA BFV FHE CKKS FHE

98/ 100

HICS-PQ Attestation

pqc/sphincs/mod.rs + pqc/sphincs/params.rs

Last scanned: March 31, 2026 · Auto-updates on release

Correctness 100 / 100

Weight: 40%

✓ 21 / 21 unit tests passing
✓ 5 variants: SHA2-128f, 128s, 192f, 256f, 256s
✓ All variants sign-verify round-trip verified
✓ Invalid message rejection verified
✓ Cross-variant rejection verified
✓ Batch signer + key pool verified

Security 100 / 100

Weight: 30%

✓ Hash-based ONLY — zero lattice assumptions
✓ Survives any lattice cryptanalysis breakthrough
✓ Security depends solely on SHA-2 collision resistance
✓ Stateless — no state management required
✓ Conservative: maximum security guarantees

Performance 92 / 100

Weight: 15%

✓ SHA2-128f: fast variant, 17 KB signatures
✓ SHA2-128s: small variant, 7.8 KB signatures
✓ SHA2-256s: 29.8 KB (trade-off for L5 security)
✓ PK: 32-64 bytes (smallest PQ public keys!)
✓ 5 parameter sets for speed/size trade-off

Standards 100 / 100

Weight: 15%

✓ NIST FIPS 205 (SLH-DSA) compliant
✓ OIDs registered: 2.16.840.1.101.3.4.3.20-25
✓ NIST Levels 1, 3, 5 implemented
✓ SHA-2 hash function family (NIST approved)
✓ Pure Rust via pqcrypto-sphincsplus

Parameter Specifications

Parameter	Value
Security Levels	NIST Levels 1, 3, 5
PK Size (L1)	32 bytes
PK Size (L5)	64 bytes
Sig Size (128f, fast)	17,088 bytes
Sig Size (128s, small)	7,856 bytes
Sig Size (256s, small)	29,792 bytes
Foundation	Hash-based (SHA-2 only)
Unit Tests	21
Variants	5 (speed/size trade-offs)
Key Advantage	No lattice assumptions

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