Design of Dynamic Password Authentication Scheme Based on SM Algorithm

At present, some identity authentication schemes of intelligent terminals in distribution networks need to install additional hardware or issue digital certificates, and are vulnerable to replay attacks, impersonation attacks and other malicious attacks. To solve the above problems, this paper proposes a dynamic password authentication scheme based on SM2, SM3, SM4 algorithm combined with terminal ID, hardware address MAC, and shared password value PW. This scheme can realize the two-way identity authentication between the power distribution master station and the intelligent power distribution terminal. Experiment simulation and security analysis show that this scheme can resist the common malicious attacks such as replay attack, man in the middle attack and impersonation attack. Compared with other schemes, this scheme has more security features and improves the security of identity authentication while reducing the hardware cost of authentication schemes and avoiding the difficulty of digital certificate management and maintenance.