This work introduces new key recovery attacks against the Rainbow signature scheme,
which is one of the three finalist signature schemes still in the NIST Post-Quantum …

Abstract The National Institute of Standards and Technology is in the process of selecting
publickey cryptographic algorithms through a public, competition-like process. The new …

We present here the analysis of a new perturbation, that seems to strengthen significantly
the security of some families of multivariate schemes. Thanks to this new perturbation, we …

Abstract The Support Minors method of solving the MinRank problem has contributed to
several new cryptanalyses of post-quantum cryptosystems including some of the most …

Group-based cryptography is a relatively unexplored family in post-quantum cryptography,
and the so-called Semidirect Discrete Logarithm Problem (SDLP) is one of its most central …

Quantum computers are a threat to the current standards for secure communication. The
Datagram Transport Layer Security (DTLS) protocol is a common protocol used by Internet …

Abstract Hash-and-Sign with Retry is a popular technique to design efficient signature
schemes from code-based or multivariate assumptions. Contrary to Hash-and-Sign …

We consider the problem of computing a grevlex Gröbner basis for the set Fr (M) of minors of
size r of an n× n matrix M of generic linear forms over a field of characteristic zero or large …

Abstract (that stands for Hidden Field Equations) belongs to multivariate cryptography and
was designed by Jacques Patarin in 1996 as a public key trapdoor suitable for encryption or …

In this paper we introduce a new attack on the multivariate encryption scheme HFERP, a big
field scheme including an extra variable set, additional equations of the UOV or Rainbow …