A Regulatory Anonymous Authentication Method Based on Zero-Knowledge Proof

Abstract

The invention discloses a supervised anonymous authentication method based on zero-knowledge proof, including three types of participants: CA, user and verifier, wherein: the CA generates the issuer key pair and the group key, and when the user registers, the CA is It distributes a pair of private keys, and CA issues relevant certificates to users based on the attribute information submitted by the user; when the user presents the certificate, the verifier specifies the attributes that need to be presented on the user certificate, the user signs the certificate, and hides the information that does not need to be presented. Attribute value; the verifier verifies the signature. If the signature is verified, the certificate presented by the user is valid; otherwise, the certificate presented by the user is invalid. The present invention also ensures the anonymity of the user while increasing the compulsory supervision function, and greatly protects the privacy of the user's identity compared with the general identity supervision scheme. The present invention also adds supervisory functionality.

Description

technical field [0001] The invention relates to a supervised anonymous authentication method based on zero-knowledge proof. Background technique [0002] Traditional identity authentication technology is mainly used for users to prove to the verifier that they are legitimate users, and can be widely used in communication, finance, social networking and other fields. However, the existing authentication technology does not consider the issue of user identity privacy protection. During authentication, users may over-expose their own information, resulting in information leakage or theft. Therefore, it is necessary to use anonymous authentication technology to protect the identity privacy of users. [0003] Anonymous authentication technology mainly uses cryptography to ensure the privacy of users. For example, the Identity Mixer scheme proposed by IBM provides an anonymous authentication method, and users can choose to present attributes independently during authentication. A...

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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a supervised anonymous authentication method based on zero-knowledge proof. Aiming at the problem of excessive exposure of user identity and attribute information in the traditional authentication system, the technical means of anonymous authentication is used to protect the identity of the user. Identity privacy, while adopting a flexible authentication strategy, so that users can choose to present the attributes in the certificate to avoid excessive exposure of information; in view of the problem that cannot be supervised in anonymous authentication, combined with the technical means of group signature, CA can supervise the user's identity information , to avoid the occurrence of untrustworthy behavior

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