基于220C协议的无线分组网络安全机制

对无线分组协议MIL-STD 188-220C中的安全问题进行探讨，通过分析DAP-NAD 算法的工作原理，利用排队论的内容从算法的信道分配过程中提取一种非强占优先的M/G/1的排队模型，通过模型分析指出算法存在的安全隐患，并据此提出一种可能的攻击算法以验证其安全机制的不足。在仿真平台下搭建遵循DAP-NAD算法无线网络模型，通过运行攻击算法前后网络性能产生的变化，指出DAP-NAD 算法的消息优先级机制的安全隐患及可能的对抗机制。

Security Mechanism for Radio Packet Network Based on 220C Protocol

This paper discusses the security mechanism of the digital radio packet protocol MIL-STD 188-220C. Through the analysis of the principle of DAP-NAD algorithm, a non-interruption preferential M/G/1 model is extracted to analyze the security risks of DAP-NAD algorithm. Furthermore, an antagonism algorithm is proposed to verify the probability. A wireless network model composed of 12 nodes is set up in OPNET. All the nodes communicate according to the 220C, and DAP-NAD is chosen as the channel allocation algorithm. The antagonism algorithm is executed in the network model, and performances of network are compared. Related simulations are done to evaluate the performance of the protocol and verify the feasibility of the antagonism strategies.