Secure communication method, system and device

The invention provides a secure communication method, system and device, and belongs to the technical field of communication. The method comprises the following steps: receiving a service request, andobtaining a command word and a service number in the service request; determining a joint idle state of a receiving buffer area and a sending buffer area corresponding to the type of the command word; performing idle state query on the receiving buffer area and the sending buffer area according to the service number; when the idle states of the receiving buffer area and the sending buffer area accord with the joint idle state, executing service data response matched with the types of the service number and the command word, or when the idle states of the receiving buffer area and the sendingbuffer area do not accord with the joint idle state, responding to a state word. The invention is used for realizing the fusion of multiple security services. 本发明提供一种安全通信方法、系统及装置，属于通信技术领域。所述方法包括：接收业务请求，并获得所述业务请求中的命令字和业务号；确定与所述