无线自组网中一种基于嵌入式水印的身份认证方案实现

Authentication Scheme based on Embedded Watermark in Wireless Ad Hoc Network

物理层安全认证技术极大降低了资源消耗和计算复杂度,为资源受限的无线自组网中实现身份认证提供了新途径。基于此,在通用软件无线电外设(Universal Software Radio Peripheral,USRP)平台基础上设计了具有身份认证功能的时分多址(Time Division Multiple Access,TDMA)组网协议,实现了一种适用于无线自组网中基于嵌入式水印的身份认证方案,该方案在信息帧的介质访问控制(Media Access Control,MAC)层嵌入水印标签实现入网用户的身份认证。最后,在真实信道环境中测试了所提方案在无线自组网的物理层认证性能,并分析了水印嵌入功率对误码率、认证准确率的影响。

The physical layer security authentication technology greatly reduces resource consumption and computational complexity,and provides a new way to realize identity authentication in resource-constrained wireless Ad Hoc networks.In this paper,TDMA networking protocol with identity authentication function is designed on the basis of USRP platform,and an identity authentication scheme based on embedded watermark is implemented in wireless Ad Hoc network.This scheme embeds a watermark label in the MAC layer of information frame to realize the identity authentication of network users.Finally,the physical layer authentication performance of the proposed scheme in wireless ad hoc networks is tested in a real channel environment,and the influence of watermark embedding power on bit error rate and authentication accuracy is analyzed.