关键词: 安全通信协议, 开放式网络传输环境, RSSP, SM4算法

Abstract: In an open network transmission environment, communication between security devices requires a complete data communication protocol to ensure the security of application data. This paper proposes an optimization scheme for secure communication protocols, which uses SM4 algorithm to encrypt the data transmitted in the RSSP-I secure communication protocol, and optimizes the layered structure, message structure and communication interaction process of the secure communication protocols in an open network environment. Through analysis and demonstration, this paper shows that this method for implementing secure communication protocols provides effective defense and protective technical measures in response to all possible threats existing in the open transmission system, meeting the security requirements for data transmission between security devices.

Key words: safety communication protocol, open network transmission environment, RSSP, SM4 algorithm