Blockchain-based cross-domain anonymous authentication method and system

Abstract

The invention provides a blockchain-based cross-domain anonymous authentication method and system. A trusted key generation center is set to issue a public-private key pair for a registration center, and a blockchain smart contract is deployed to manage the key information of the communicating parties; the registration center is Ordinary users provide registration services, generate signatures to realize certificate authentication services, and store the communication party identification information and public key information related to the business system in the blockchain smart contract in a privacy-protected manner; when the communication parties perform mutual authentication, anonymous The authentication information is sent in the way of authentication, and the blockchain smart contract query interface is called to check the user's identification information and whether the authentication user's public key is registered; the smart contract manages the identification information and key information, and provides real-time updates of the user identification information and key information. , to avoid the introduction of single point of failure attacks, out-of-sync updates, and high communication overhead, and to support cross-domain authentication services for users. The anonymous authentication technical solution has good security, stability and reliability.

Description

technical field [0001] The invention belongs to the technical field of information security, in particular to a block chain-based cross-domain anonymous authentication method and system. Background technique [0002] Anonymous authentication protocol is an important part of network security communication. By implementing an anonymous authentication protocol, two participants can authenticate each other on a public channel and negotiate a session key in order to achieve secure communication in an open network. In an anonymous protocol based on traditional public key cryptography authentication, both communicating parties have a pair of public and private keys: a public key and a private key, where the private key is used to generate authentication information, and the public key is used to verify the validity of the information. However, the authentication of the public key requires the certificate center to issue a digital certificate for each user, which is used to achieve...