认知协同电力通信接入网密钥生成机制  

Key Generation in Cognitive Mechanism Cooperative Communication Network

作　　者：李洪兵[1] 李志勇[1] 王灿[2] 唐夲 彭澜[3] 

机构地区：[1]国网重庆市电力公司江北供电分公司,重庆401120 [2]重庆大学通信工程学院,重庆400044 [3]国网重庆市电力公司,重庆400015

出　　处：《信息安全与通信保密》2014年第5期82-89,共8页Information Security and Communications Privacy

基　　金：国家自然科学基金资助项目(批准号:60872038);国家电网公司科技资助项目(2013渝电科技36#)

摘　　要：针对认知协同电力通信接入网存在的安全威胁,设计一种基于信道物理特征的非对称密钥生成机制与安全信道选择准则。通信节点分别执行频谱感知并交换可用信道列表,生成频谱池。选择1个以上的可用频率信道收发信标,依据同一频率信道相干时间内的对等性和互易性、相干时间外和不同频率信道的差异性和独立性,检测并利用接收信标信号相位生成随机密钥矩阵,对密钥矩阵融合处理获得通信密钥,将通信密钥作为随机种子在频谱池中选择通信信道,并定时更新通信信道和控制信道,防止攻击者窃听、篡改或饱和等攻击。分别就密钥生成及信道选择进行了仿真测试,结果表明,利用该密钥生成机制生成的通信密钥随机性强、密位匹配率高,据此选择的安全通信信道的建链成功率也较高。Aiming at the security problems in cognitive cooperative power communication access network, a key generation mechanism and safe channel selection criterion based on channel characteristics is designed. Each node implements spectrum sense respectively, exchanges available channel lists, and then generates spectrum pool. More than one available frequency channels are chosen to send and receive beacon signal. For to the same frequency has reciprocity and equivalence in the channel coherence time and the different frequency out of channel coherence time has difference and independence channel characteristics, the received signal phase is detected and used to generate random key matrix, thus the communication key is acquired through key matrix fusion processing, and then the communication key is used as random seeds to choose a communication channel from the spectrum pool, and the communication channel and control channel are updated after a certain time interval, thus to prevent malicious node eavesdropping, tampering or channel consultation block attacks. Simulation results show that this mechanism can generate communication keys with high randomness and maintain frequency-agreement ratio, and thus can guarantee high-agreement ratio of the safe communications channel selection.

关 键 词：认知无线电 协同通信 网络安全 通信密钥 信道选择 

分 类 号：TN918.7[电子电信—通信与信息系统]