What is SLH-DSA? Hash-Based Post-Quantum Digital Signature Guide
SLH-DSA is NIST’s standardised post-quantum digital signature algorithm (hash-based). It generates quantum-resistant signatures, ensuring signatures are not changeable and that they will not be forged, even when later superseded by schemes like RSA and ECDSA, which are susceptible to attacks by quantum computers. Organisations are studying it today because large-scale quantum computers could, in the future, crack the algorithms that currently underpin most digital trust.