Security parameter interaction method, device and system, and equipment

The embodiment of the invention provides a security parameter interaction method, device and system, and equipment. The method comprises: enabling the equipment executing the scheme to construct a first message based on a secret key protocol, wherein the first message comprises an encrypted security parameter; adding the first message to an expansion field of the HTTP request message to obtain anexpanded HTTP request message; sending an extended HTTP request message. Visibly, in the scheme, the HTTP message is expanded, and the security parameters are added to the expansion field of the HTTPrequest message, so that the compatibility of the HTTP and a key protocol is realized. 本申请实施例提供了一种安全参数交互方法、装置、设备及系统，方法包括：执行本方案的设备基于密钥协议，构造第一消息，第一消息中包括已加密的安全参数；将第一消息添加到HTTP请求报文的拓展字段，得到拓展HTTP请求报文；发送拓展HTTP请求报文；可见，本方案中，对HTTP报文进行了拓展，将安全参数添加到HTTP请求报文的拓展字段，实现了HTTP与密钥协议的兼容。