The invention relates to the field of security protection of the
electric power Internet of Things, in particular to a lightweight identity
authentication method for limited equipment under the
electric power Internet of Things, which can adapt to a large-scale and widely distributed network environment of the
electric power Internet of Things by introducing a lightweight
encryption algorithm and an efficient
key exchange protocol, ensures the security, and improves the
authentication efficiency of the limited equipment under the electric power Internet of Things. The calculation burden and the
energy consumption of limited equipment in the power Internet of Things are effectively reduced; a decentralized
authentication mechanism is adopted, so that the problems of single-point failure and performance
bottleneck in a traditional centralized authentication method are solved, efficient equipment authentication and
key exchange are realized, and the expandability of a network is ensured; security threats such as replay attacks and man-in-the-middle attacks are effectively prevented by periodically updating session keys and using digital signatures, and the reliability of
network communication and the
confidentiality of data are enhanced. By introducing a
key exchange protocol and a
digital signature technology, the integrity and authenticity of data are guaranteed, tampering behaviors of malicious nodes are prevented, and the overall security of the
system is improved.