Cross-domain anonymous authentication method and system based on block chain

Abstract

The invention provides a cross-domain anonymous authentication method and system based on a blockchain. A trusted key generation center is set to issue a public and private key pair to a registrationcenter, and deploy key information of a blockchain smart contract management communication party; the registration center provides registration service for a common user, generates a signature to realize certificate authentication service, and stores communication party identification information and public key information related to a service system into the blockchain intelligent contract in a privacy protection mode; when two communication parties carry out mutual authentication, authentication information is sent in an anonymous mode, a blockchain intelligent contract query interface is called to check identification information of a user, and whether a public key of the user is registered or not is checked and authenticated; the smart contract manages the identification information and the key information, provides real-time update of the user identification information and the key information, so that the method avoids the problems of introduction of single-point fault attacks, asynchronous update, high communication overhead and the like, and supports user cross-domain authentication service. The anonymous authentication technical scheme has good security, stability and reliability.

Description

technical field [0001] The invention belongs to the technical field of information security, in particular to a blockchain-based cross-domain anonymous authentication method and system. Background technique [0002] Anonymous authentication protocols are 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 for secure communication in an open network. In an anonymous protocol based on traditional public-key cryptography authentication, both parties to the communication 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 legitimacy of the information. However, the certification of the public key requires the certificate center to issue digital certificates for each user, which is used to realize secure ...

AI Technical Summary

Problems solved by technology

For open networks, such as self-organizing networks, there is a serious potential for privacy leakage

Although many cryptographic protocols have been proposed to facilitate secure authentication of network systems, existing protocols generally do not support conditional controllable anonymity and flexible key management

In addition, the existing technology requires users to re-register in cross-domain situations, and it is difficult to support efficient cross-domain authentication functions for mobile users