/The Rank metric decoding problem is the main problem considered in cryptography based on codes in the rank metric. Very efficient schemes based on this problem or quasi-cyclic versions of it have been proposed recently, such as those in the

In this work, we analyze keyed-hashing modes with respect to collision resistance in a blinded keyed hashing model for the attacker in both serial and parallel constructions to do compression functions in cryptography. The serial construction is used in CBC-MAC

Mixed Integer Linear Programming (MILP) solvers are regularly used by designers for providing security arguments and by cryptanalysts for searching for new distinguishers. For both applications, bitwise models are more refined and permit to analyze properties of primitives more accurately

Keccak est une fonction de hachage conçue par Guido Bertoni, Joan Daemen, Michaël Peeters et Gilles Van Assche dans le cadre de la compétition du NIST pour la standardisation d'un nouvel algorithme de hachage cryptographique. En 2012, Keccak remporte cette

Finite fields have a central role in cryptography, since many protocols use them as their foundation. Therefore, it is crucial to have efficient arithmetic operations, e.g. multiplication and addition, over finite fields. Multiplication is usually quite expensive, hence there has

Let Fq be a finite field and E_b : y^2 = x^3 + b be an ordinary elliptic Fq-curve of j-invariant 0 such that sqrt(b) is in Fq. In particular, this condition is fulfilled for the curve BLS12-381 and for

In 2019, Antoine Joux proposed a FHE based on Fermat numbers, with an aim to express all cryptographic functions in simple operations on the ciphertext components and their binary decompositions. We use recent results on sub-Gaussian variables to find better

Fresh re-keying is a recent and promising direction to handle side-channel attacks in cryptographic solutions. It is a simple, plug-in, efficient function that handles the core of side-channel protection directly on the secret key of cryptographic computations. State-of-the-art re-keying schemes

The last event of the crypto seminar will be dedicated to the ongoing NIST competition on lightweight cryptography. We plan to have different speakers to present both some second round candidates to the competition while also to expose some recent

We introduce a new signature scheme, SQISign, (for Short Quaternion and Isogeny Signature)  from isogeny graphs of supersingular elliptic curves. The signature scheme is derived from a new one-round, high soundness, interactive identification protocol. Targeting the post-quantum NIST-1 level of