恶意环境中基于能量效率的安全协作频谱感知

Secure cooperative spectrum sensing based on energy efficiency in hostile environment

频谱感知是认知无线电网络运行的前提,但是在恶意环境中,频谱感知数据存在被篡改的威胁.针对该问题,提出了一种低开销的对称加密方法,采用报文鉴别码对次级用户报告的数据进行鉴权,保证数据的完整性,从而缓解攻击对感知性能的影响.提出了协作频谱感知中能量效率的概念,并通过改变报文鉴别码长度优化能量效率.仿真验证了上述方法的有效性并给出了优化问题的数值解.

Spectrum sensing is a premise for the realization of cognitive radio networks(CRN),but the spectrum sensing data is always falsified in hostile environment.A low overhead symmetric cryptographic mechanism utilizing message authentication code to authenticate the sensing data of secondary user(SU)is proposed to resolve this problem.Moreover,in this article,the concept of energy efficiency in cooperative spectrum sensing is first introduced,and the optimal length of message authentication code is provided to maximize the energy efficiency.Simulation results verify the efficiency of this scheme,and the solution of optimal problem is also evaluated.