Falcon
- Algorithm type: Digital signature scheme.
- Main cryptographic assumption: hardness of NTRU lattice problems.
- Principal submitters: Thomas Prest.
- Auxiliary submitters: Pierre-Alain Fouque, Jeffrey Hoffstein, Paul Kirchner, Vadim Lyubashevsky, Thomas Pornin, Thomas Ricosset, Gregor Seiler, William Whyte, Zhenfei Zhang.
- Authors’ website: https://falcon-sign.info
- Specification version: v1.2.
- Implementation source: https://github.com/PQClean/PQClean/commit/6c1ea921ee4a06a6b50c742ca540bb9b5e51aee2, which takes it from:
- https://github.com/jschanck/package-pqclean/tree/cea1fa5a/falcon, which takes it from:
- supercop-20201018
- Implementation license (SPDX-Identifier): CC0-1.0.
Parameter set summary
| Parameter set | Security model | Claimed NIST Level | Public key size (bytes) | Secret key size (bytes) | Signature size (bytes) |
|---|---|---|---|---|---|
| Falcon-512 | EUF-CMA | 1 | 897 | 1281 | 690 |
| Falcon-1024 | EUF-CMA | 5 | 1793 | 2305 | 1330 |
Falcon-512 implementation characteristics
| Identifier in upstream | Supported architecture(s) | Supported operating system(s) | CPU extension(s) used | No branching-on-secrets claimed? | No branching-on-secrets checked by valgrind? | Large stack usage?‡ |
|---|---|---|---|---|---|---|
| clean | All | All | None | True | True | False |
| avx2 | x86_64 | Linux,Darwin | AVX2 | True | True | False |
Are implementations chosen based on runtime CPU feature detection? Yes.
‡For an explanation of what this denotes, consult the Explanation of Terms section at the end of this file.
Falcon-1024 implementation characteristics
| Identifier in upstream | Supported architecture(s) | Supported operating system(s) | CPU extension(s) used | No branching-on-secrets claimed? | No branching-on-secrets checked by valgrind? | Large stack usage? |
|---|---|---|---|---|---|---|
| clean | All | All | None | True | True | False |
| avx2 | x86_64 | Linux,Darwin | AVX2 | True | True | False |
Are implementations chosen based on runtime CPU feature detection? Yes.
Explanation of Terms
- Large Stack Usage: Implementations identified as having such may cause failures when running in threads or in constrained environments.