SLH-DSA

FIPS 205

Stateless Hash-Based Digital Signature. Security relies solely on the security of hash functions — no lattice assumptions needed. Uses Merkle trees (8 leaves) and WOTS+ one-time signatures (chain length 4).

Algorithm Parameters

Presets

Tree leaves (one-time keys)8

232

WOTS+ chain length4

Security estimate:Medium

Tree depth 3, 8 one-time keys, chain length 4. Adequate for demonstration.

Message to sign22/64

Learn More

Enter a message and click "Run SLH-DSA" to see the Merkle tree signature scheme