Communication identifier distribution and maintenance method and system

The invention provides a communication identifier distribution and maintenance method and system, and belongs to the technical field of network security. In the method, when an end system accesses a network through a communication identification client for the first time, a communication identification is requested from an identification generation server, and the identification generation server performs identity legality check on an authentication server according to the type of the end system. And the identifier generation server generates a communication identifier according to the identifier information of the end system, and confirms the uniqueness of the communication identifier to the mapping server. And the identifier generation server stores the communication identifier mapping table in an identifier mapping server, and issues the communication identifier to the communication identifier client. And the identifier generation server periodically requires the communication identifier client to re-reque