SLH-DSA·Digital signature·NIST level 1
SLH-DSA-SHAKE-128s
SLH-DSA (FIPS 205) is a stateless hash-based signature scheme, standardized by NIST in August 2024. It relies only on the security of cryptographic hash functions — no number-theoretic assumptions. Larger signatures and slower signing, but the most conservative security basis.
The “s” (small) variant optimizes for signature size at the cost of signing speed — note the sign time is measured in seconds, not microseconds. Choose the “f” (fast) variant when signing throughput matters more than signature size.
Latest run2026-07-07 09:32 UTC
commitbfd529d- CPU
- Xeon Platinum 8259CL @ 2.50GHz
- Instance
- t3.mediumburstable
- OS / Kernel
- 24.04.4 LTS
- liboqs
- 0.15.0
- Wall clock
- 49m 51s
- CPU steal
- 0.83%
Parameters
- Family
- SLH-DSA
- Parameter set
- SHAKE-128s
- Public key
- 32 B
- Private key
- 64 B
- Signature
- 7.67 KB
- Iterations / op
- 1,000
- liboqs key
- SLH_DSA_PURE_SHAKE_128S
keygenGenerate a fresh key pair.
54 of 54 runs
- Mean
- 170.19 ms
- Median
- 168.57 ms
- p95
- 176.57 ms
- p99
- 189.51 ms
- Stdev
- 5.42 ms
- Min
- 166.85 ms
- Ops/sec
- 5.9
Mean over time
Click any point to view the GitHub Actions run that produced it.
signProduce a signature over a message using the private key.
54 of 54 runs
- Mean
- 1.301 s
- Median
- 1.294 s
- p95
- 1.338 s
- p99
- 1.399 s
- Stdev
- 23.78 ms
- Min
- 1.279 s
- Ops/sec
- 0.77
Mean over time
Click any point to view the GitHub Actions run that produced it.
verifyVerify a signature against a message and public key.
54 of 54 runs
- Mean
- 1.32 ms
- Median
- 1.29 ms
- p95
- 1.48 ms
- p99
- 2.01 ms
- Stdev
- 145.0 µs
- Min
- 1.15 ms
- Ops/sec
- 757
Mean over time
Click any point to view the GitHub Actions run that produced it.