MAYO
- Algorithm type: Digital signature scheme.
- Main cryptographic assumption: multivariable quadratic equations, oil and vinegar.
- Principal submitters: Ward Beullens, Fabio Campos, Sofía Celi, Basil Hess, Matthias J. Kannwischer.
- Authors’ website: https://pqmayo.org
- Specification version: NIST Round 2 (February 2025).
- Primary Source:
- Source: https://github.com/PQCMayo/MAYO-C/commit/4b7cd94c96b9522864efe40c6ad1fa269584a807 with copy_from_upstream patches
- Implementation license (SPDX-Identifier): Apache-2.0
Parameter set summary
| Parameter set | Parameter set alias | Security model | Claimed NIST Level | Public key size (bytes) | Secret key size (bytes) | Signature size (bytes) |
|---|---|---|---|---|---|---|
| MAYO-1 | NA | EUF-CMA | 1 | 1420 | 24 | 454 |
| MAYO-2 | NA | EUF-CMA | 1 | 4912 | 24 | 186 |
| MAYO-3 | NA | EUF-CMA | 3 | 2986 | 32 | 681 |
| MAYO-5 | NA | EUF-CMA | 5 | 5554 | 40 | 964 |
MAYO-1 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 | opt | All | All | None | True | True | False |
| Primary Source | avx2 | x86_64 | Darwin,Linux | AVX2 | True | True | False |
| Primary Source | neon | ARM64_V8 | Darwin,Linux | None | True | False | 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.
MAYO-2 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 | opt | All | All | None | True | True | False |
| Primary Source | avx2 | x86_64 | Darwin,Linux | AVX2 | True | True | False |
| Primary Source | neon | ARM64_V8 | Darwin,Linux | None | True | False | False |
Are implementations chosen based on runtime CPU feature detection? Yes.
MAYO-3 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 | opt | All | All | None | True | True | False |
| Primary Source | avx2 | x86_64 | Darwin,Linux | AVX2 | True | True | False |
| Primary Source | neon | ARM64_V8 | Darwin,Linux | None | True | False | False |
Are implementations chosen based on runtime CPU feature detection? Yes.
MAYO-5 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 | opt | All | All | None | True | True | True |
| Primary Source | avx2 | x86_64 | Darwin,Linux | AVX2 | True | True | True |
| Primary Source | neon | ARM64_V8 | Darwin,Linux | None | True | False | True |
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.