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Rainbow

  • Algorithm type: Digital signature scheme.
  • Main cryptographic assumption: multivariable polynomials, unbalanced oil and vinegar.
  • Principal submitters: Jintai Ding.
  • Auxiliary submitters: Ming-Shing Chen, Matthias Kannwischer, Jacques Patarin, Albrecht Petzoldt, Dieter Schmidt, Bo-Yin Yang.
  • Authors’ website: https://www.pqcrainbow.org/
  • Specification version: NIST Round 3 submission.
  • Implementation source: https://github.com/PQClean/PQClean/commit/6c1ea921ee4a06a6b50c742ca540bb9b5e51aee2, which takes it from:
    • https://github.com/fast-crypto-lab/rainbow-submission-round2/commit/173ada0e077e1b9dbd8e4a78994f87acc0c92263
  • 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)
Rainbow-I-Classic EUF-CMA 1 161600 103648 66
Rainbow-I-Circumzenithal EUF-CMA 1 60192 103648 66
Rainbow-I-Compressed EUF-CMA 1 60192 64 66
Rainbow-III-Classic EUF-CMA 3 882080 626048 164
Rainbow-III-Circumzenithal EUF-CMA 3 264608 626048 164
Rainbow-III-Compressed EUF-CMA 3 264608 64 164
Rainbow-V-Classic EUF-CMA 5 1930600 1408736 212
Rainbow-V-Circumzenithal EUF-CMA 5 536136 1408736 212
Rainbow-V-Compressed EUF-CMA 5 536136 64 212

Rainbow-I-Classic 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

‡For an explanation of what this denotes, consult the Explanation of Terms section at the end of this file.

Rainbow-I-Circumzenithal 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

Rainbow-I-Compressed 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

Rainbow-III-Classic 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 True

Rainbow-III-Circumzenithal 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 True

Rainbow-III-Compressed 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 True

Rainbow-V-Classic 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 True

Rainbow-V-Circumzenithal 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 True

Rainbow-V-Compressed 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 True

Explanation of Terms

  • Large Stack Usage: Implementations identified as having such may cause failures when running in threads or in constrained environments.







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