Joint signature authentication scheme based on blockchain technology

Accompanied by the development of big data and cloud computing and other technologies, the traditional centralized authentication technology faces increasing security risks due to the existence of its trusted center. In order to solve the problems, blockchain technology enters the scope of research scholars. In this paper, we focus on the authentication and secure data transmission scheme of data sender to receiver via some other node in the absence of trusted center under the situation of three-party participation in the field of identity authentication. In this paper, we introduce the identity-based cryptosystem and design a three-party joint signature and authentication scheme based on the SM9 identification algorithm, combined with the decentralized, tamper-proof, publicly verifiable and other characteristics of blockchain technology. The scheme realizes the identity authentication and message integrity verification. The analysis shows that the scheme has security attributes such as decentralization and privacy protection, at the same time, we also demonstrate that the proposed scheme has the property of mitigating common network attacks.