digital signature Archivi

CROSS: Code-Based Digital Signature

Introduction In 2022, NIST launched a second standardization process for post-quantum digital signature schemes, with the goal of diversifying the mathematical foundations of the cryptographic portfolio with respect to the schemes already...

Multivariate signatures based on identification schemes

15 Feb

Introduction The goal of an identification protocol is to enable the verification of someone’s identity. More specifically, a Prover must demonstrate to an interlocutor, called the Verifier, that they...

UOV and its Variants: Digital Signatures Based on Multivariate Systems

24 Nov

In the previous exploration of multivariate cryptography, we examined how systems of polynomial equations over finite fields can form the basis for cryptographic schemes resistant to quantum computing attacks. The...

New post-quantum digital signature proposals: the second NIST competition

16 Oct

Introduction In July 2023, NIST announced four winning algorithms in the post-quantum competition, marking an important step forward in the transition process. The selected algorithms were CRYSTALS-Kyber for key negotiation...

Falcon: digital signature based on NTRU

31 Jul

Introduction NIST’s Post-Quantum standardization process has identified two cryptographic schemes based on lattice theory within digital signatures: CRYSTALS-Dilithium and Falcon. Within modern cryptographic communication protocols, these solutions will replace the...

Digital signature algorithms: present and future

21 Oct

Introduction and general structure In many ways, digital signatures are the digital equivalent of the handwritten signatures we all use every day. However, the main difference between the two is...