Key generation method of communication system

The invention provides a secret key generation method of a communication system, which comprises four stages: the first stage is a system initial stage, the second stage is a registration stage, the third stage is a verification stage, and the fourth stage is a secret key exchange stage. The invention further provides a secret key generation device of the enhanced communication system, and the secret key generation device comprises a memory which is used for storing instructions executed by the computer; and the processor is used for executing the computer instructions stored in the memory so as to realize the functional steps of the method. By adopting the technical scheme provided by the invention, the security between transmission of an army communication system can be thoroughly solved, the situation that related information is obtained or is stolen during transmission due to local disguising and pretending identity is avoided, the communication efficiency can be improved, and the calculation amount is re