Distributed public key infrastructure scheme based on blockchain and decentralized undeniable attribute-based signature

Abstract

A flexible and effective identity system scheme has always been one of the core needs of the information age. Traditional centralized public key infrastructure has a number of flaws, and the present distributed public key infrastructure based on blockchain has a number of issues with performance, resilience, non-repudiation, identity flexibility, and other factors. This paper innovatively combines blockchain with decentralized undeniable attribute-based signatures and proposes a novel distributed public key infrastructure, which uses threshold algorithms and attribute-based signatures for fine-grained management of identities; the paper also introduces non-interactive zero-knowledge proof to make the certificate undeniable and uses the blockchain consensus mechanism to synchronize the certificate library to achieve distributed identity authentication. Through experimental modeling and analysis combined with specific scenarios' actual landing demand, this article indicates that the solution is adequate in terms of security and usability.