https://www.nist.gov/publications/practical-attack-all-parameters-hppc-signature-scheme
HPPC is a multivariate signature scheme submitted to the NIST PQC standardization process in response to the recent call for additional signature schemes.
attack onsignature schemepracticalparameters
https://link.springer.com/chapter/10.1007/BFb0055733?error=cookies_not_supported&code=db1fbbda-f499-4c7d-acdf-134b7bfa778c
Several multivariate algebraic signature schemes had been proposed in recent years, but most of them had been broken by exploiting the fact that their secret...
oil and vinegarsignature schemecryptanalysisspringerlink