抗SSDF攻击的一致性协作频谱感知方案  

Securing Consensus-Based Cooperative Spectrum Sensing Against Spectrum Sensing Data Falsification Attacks

作　　者：刘全[1] 高俊[1] 郭云玮[1] 刘思洋[1] 

机构地区：[1]海军工程大学通信工程系,湖北武汉430033

出　　处：《电子学报》2011年第11期2643-2647,共5页Acta Electronica Sinica

基　　金：国家863高技术研究发展计划(No.2009AAJ208;2009AAJ116)

摘　　要：在分布式认知无线电网络中,一般很难找到合适的融合中心能够收集所有协作用户的感知信息,而且协作过程极可能遭到篡改感知数据(Spectrum Sensing Data Falsification,SSDF)攻击.鉴于此,该文提出了一种改进的一致性协作频谱感知方案.利用Metropolis迭代规则,各次用户仅依靠邻接点之间的局部信息交互即可实现感知协作,且无需网络的任何先验知识.为了抵抗潜在的三种SSDF攻击,该方案中引入了相应的抗攻击策略,使合法次用户能及时检测并拒绝恶意用户接入网络.仿真结果表明,改进方案能保证绝大多数合法次用户最终趋于状态一致,并分别做出正确决策;与现有的一致性方案相比,该方案能使协作感知在各种攻击场景中的稳健性明显增强.In distributed cognitive radio networks（CRNs）,a common fusion centre is always not available to collect the sensing results from all cooperative users,and the sensing cooperation is likely to be disrupted by spectrum sensing data falsification（SSDF） attacks.Allowing for these factors,this paper proposes a modified consensus-based scheme for decentralized cooperative spectrum sensing（CSS）.Utilizing the iteration rule based on Metropolis weight matrix,each secondary user（SU） can maintain cooperation with others only through the local information exchange in the neighborhood,without requiring any a priori knowledge of the whole network.To counter three potential attack models of SSDF,some anti-attack strategies are also introduced,by which the authentic SUs can identify and reject the malicious users quickly.As represented by the extensive simulation results,the proposed scheme can generally guarantee most authentic SUs to reach a consensus and make right decisions individually;also,it is proved to be much more robust against all potential SSDF attacks,compared with the existing consensus-based scheme.

关 键 词：认知无线电网络 协作频谱感知 感知安全 一致性 篡改感知数据攻击 

分 类 号：TN92[电子电信—通信与信息系统]