Anonymous Authentication Scheme Based on Non-Interactive Zero-Knowledge Proof

Abstract

With the rapid advancement of the digital age, the Internet has become an integral part of daily life. While users benefit from the convenience of online services, they are increasingly confronted with a critical conflict between identity privacy and security. Under traditional authentication mechanisms, malicious actors often exploit the login channel immediately after user registration, leading to the leakage of personal data. To address this issue, this paper proposes an anonymous identity authentication scheme based on non-interactive zero-knowledge proof. By employing ring signatures in combination with non-interactive zero-knowledge proofs, the proposed method ensures both the legitimacy of user identities and the security of the authentication process. Furthermore, the use of national cryptographic algorithms enhances the scheme's resilience against external attacks. Finally, we conduct comparative experiments to evaluate the proposed scheme. The results demonstrate that it provides anonymity, zero-knowledge soundness, resistance to quantum attacks, replay attacks, and double-spending. Additionally, the scheme achieves higher efficiency in signature generation and verification compared to an RSA+SHA-based ring signature authentication approach.