针对自主可识别性机制,基于最短K-路径算法,提出一种可生存系统认知性的评估机制.首先,建立了可生存系统认知性评估的框架结构,给出了认知状态转移矩阵和认知评估指标;然后,对可生存系统的认知生存能力进行量化建模;最后,对某网络安全态势感知系统,针对Do S攻击行为,进行了认知性能的仿真验证,结果表明,所提方法如实反映了系统在不同攻击参数下认知性的动态演化,分析了系统中存在的生存威胁,验证了所提方法的可行性. In view of the self-identifiable mechanism, a novel evaluation mechanism of survivability of the system is proposed based on the shortest K-path algorithm.Firstly, a framework of the cognitive assessment of survivable system is established and the cognitive state transition matrix And cognition evaluation index. Secondly, the cognitive survivability of the survivable system is quantitatively modeled. Finally, a network security situational awareness system is designed to simulate the DoS attack behavior. The results show that, The proposed method accurately reflects the dynamic evolution of the system under different attack parameters, analyzes the existence threats in the system, and verifies the feasibility of the proposed method.