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liboqs/docs/algorithms/sig/falcon.md
Douglas Stebila fd1b89724a
Update SPHINCS+ (#1420) 
* Switch to new PQClean commit for SPHINCS+ and remove old patch file

* Improve "compilability" on Apple M1 (ARM) (#1421)

* correct ARM SHA3 extension addition

* correct compile option for ARM SHA

* correct SHA3 enablement

* Remove SPHINCS+ robust and Haraka variants

* Fix SHA2 block sizes in OpenSSL wrapper

* enable Keccak for Sphincs even if OpenSSL shall provide SHA3

* properly handle xkcp enablement if only specific algorithms are selected

* correct conditional setting

* re-enable XKCP for other platforms

* Windows support

* alternate pqcrystals-AES removal

---------

Co-authored-by: Michael Baentsch <57787676+baentsch@users.noreply.github.com>
2023-05-16 10:54:28 -04:00

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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 Prest, Thomas Ricosset, Gregor Seiler, William Whyte, Zhenfei Zhang.
  • Authors' website: https://falcon-sign.info
  • Specification version: 20211101.
  • Primary Source:
    • Source: c1b19a865d
    • Implementation license (SPDX-Identifier): MIT

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 666
Falcon-1024 EUF-CMA 5 1793 2305 1280

Falcon-512 implementation characteristics

Implementation source 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?‡
Primary Source clean All All None True True False
Primary Source avx2 x86_64 All 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

Implementation source 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?
Primary Source clean All All None True True False
Primary Source avx2 x86_64 All 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.