Tools
SLH-DSA (FIPS 205)
Hash-based signatures (formerly SPHINCS+). Larger signatures, slower signing.
Educational demo - don't copy/paste into production
All cryptography runs locally in your browser. Keys and plaintext never leave your
device, but this is still a simplified demo.
Signing keypair
Legacy name: SPHINCS+
SLH-DSA trades speed and signature size for conservative hash-based security. Expect large signatures and slower signing.
Larger parameter sets increase signature size and signing time.
Public key
Size: -
Secret key
Size: -
Sign + verify
Size:
Signature
Size: -
No signature yet.
Sizes & timings
Sizes
- Public key: -
- Secret key: -
- Signature: -
Timings
- Key generation: -
- Sign: -
- Verify: -
Security model (30 seconds)
SLH-DSA signing happens locally with large hash-based signatures. The browser keeps all keys and messages in-memory, and only the public key is needed for verification. No server-side secrets and no user tracking are used.