FN-DSA
Falcon, expected FIPS 206
A lattice-based post-quantum signature scheme selected by NIST for standardisation, valued for signatures substantially smaller than ML-DSA. Implementation is harder because it relies on floating-point Gaussian sampling.
In practice
Algorand uses Falcon for the state proofs that secure its cross-chain bridges.
Related terms
The NIST-standardised lattice-based digital signature algorithm, intended as the general-purpose post-quantum replacement for RSA-PSS and ECDSA. Signatures are larger than ECDSA but performance is practical for most uses.
A stateless hash-based post-quantum signature scheme whose security depends only on the strength of its underlying hash function. Signatures are large and slow, but the security assumptions are the most conservative of the NIST signature standards.