Abstract: This paper presents an adaptive security model that aims at securing communications in distributed environment. Traditional secure communications model usually applies a uniform and statically decided upon security policy to each session. However, a better approach be established if using both the redundancy and adaptation methods to construct the security level, and using a threat and performance driven framework to support secure communication in network environments. This model can dynamically adapt its security policy based on the security situation and performance of the system on per session basis

Key words: Network communication security; Adaptive; Redundancy; Cloud models

摘要： 针对传统安全通信系统采用静态安全策略，从而缺乏可生存性与高效性的问题，提出了一种由系统安全威胁和系统性能双重驱动的自适应网络安全通信模型。使用冗余和多样性技术，该模型能够根据系统当前安全态势以及系统性能状态动态地针对每个会话调整安全策略，具有很强的可生存性和高效性。

关键词: 网络通信安全；自适应；冗余；云模型