Abstract: In order to improve the capability of information security protection of the charging pile and guarantee the confidentiality， integrity and authenticity of data transmitted between charging pile and background service management center， this paper analyses the information security threat and security requirements of the charging pile and designs an information security protection scheme of charging pile-background service management center on the basis of authentication and encryption by means of using AES algorithm and HMAC-SHA256 algorithm. On the basis of STM32F407ZGT6 and embedded operating system μC/OS-III， a simulation platform of charging pile communication is built. Then， the application layer communication protocol has been formulated to implement the information security protection scheme of charging pile-background service management center. Finally， the transmission time of four security cases （plaintext transmission， encrypted transmission， authentication transmission and authentication encryption transmission） is measured and the effect of information security protection scheme on real-time transmission is quantified. The results show that the information security protection scheme designed can meet the confidentiality， integrity， authenticity and real-time requirements of communication between the charging pile and background service management center.

Key words: distributed charging pile, information security protection scheme, communication simulation platform, implementation of security protection scheme