The study of security models for the communication system in CERS has become the research hotspot. Multi-living agent method is a new method to analysis the complex system. This paper proposes to use a new method of multi-living agent to design security models for the communication system in CERS based on analyzing the traditional communication system in CERS, according to the guiding theory of the system; the paper designs a authentication encryption model and a VPN (virtual private network) model for the communication system in CERS based on multi-living agent method to enhance the security. It provides a good research direction to further improve the security of communication systems in CERS. http://www.sjie.org/paperInfo.aspx?ID=251
