Local Communication Data Protection Scheme of Measurement Automation System Based on CAN Bus

The local communication system of the metering automation system is mainly composed of concentrators, collectors, and smart meters. In addition to power metering, it also has functions such as power consumption information storage, user-side control, and power theft prevention. Attacks on smart meters and data concentrators may cause major power outages and losses. Taking CAN bus as an example, this paper proposes a communication protection scheme based on the national secret SM4-SM3 algorithm joint mechanism, which is applied to the local communication of the metering automation system. The software and hardware design of the scheme is carried out using the ZYNQ-7020 platform, and finally analyze and evaluate the results of experimental to verify the correctness of its function.