A Distributed Authentication Scheme Based on Zero-knowledge Proof

Abstract

As an underlying technology and infrastructure, blockchain creates great value when combining with other emerging information technologies, such as Artificial Intelligence, Big Data Analysis, Cryptography Technology. Although the blockchain system has been contunuously upgraded in recent years, current blockchain still has its deficiency in terms of node control and privacy protection. First of all, the high existence rate of malicious nodes in the chain made it difficult to well purify the network environment, meanwhile the malicious nodes cannot be easily dealt with. Secondly, the correlation between nodes can still be discovered through analysis. As a result, the privacy of users' information cannot be well protected. This paper proposes a distributed identity authentication scheme based on Zero-knowledge proof, which uses face recognition technology to ensure the uniqueness and legitimacy of identity and control the generating of malicious nodes; Zero-knowledge proof algorithm is used to encrypt and support face data to prevent user identity information from being disclosed. At the same time, the linkable ring signature algorithm is adopted to confuse the correspondence between nodes and private information to further protect users' privacy information.