Implémentation d’un protocole d’authentification et d’identification basée sur une preuve à divulgation nulle de connaissance.

Abstract

This work is part of the graduation project to obtain the Master’s degree in Networks and Data Engineering (RID). We wish through this project to study, model and implement an accreditation and authentication system in a decentralized context based on Zero Knowledge Proofs. In decentralized systems, where user data is not stored on a centralized server, it is crucial to ensure information security and integrity. However, verifying the identity and authenticity of data remains a major challenge. This is why we have chosen to offer an authentication and accreditation method based on Zero Knowledge Proofs. Our approach consists in using advanced cryptographic protocols to allow the verification of information without revealing confidential details, neither on the accreditation, nor on its holder. Thus, users can prove that they have valid information without having to disclose it explicitly, while remaining anonymous, in order to avoid any follow-up or refusal related to their identity. By implementing our verifiable identifiers system, we aim to make credentials more useful on the web.By using Zero Knowledge Proofs, we allow users to have their university degrees verified by potential employers, while ensuring anonymization and secure authentication. To assess the performance of our system, we perform extensive testing and security analysis. The results show that our approach provides relative efficiency in terms of speed and guarantees verifiable credential privacy.