基于信号水印的无线网络物理层认证技术研究

Physical-Layer Authentication Technology for Wireless Network based on Watermarking Signal

基于身份的网络攻击是攻击端常用的攻击手段,同时也会极大地降低无线网络的性能。如何在物理层解决该安全认证问题,已经成为研究热点。借鉴图像中数字水印思路,无线网物理层信号水印或指纹是将秘密的安全认证编码或标签与主传输消息一起传输的一种机制,具有不需要消耗额外带宽,安全性强的特点。首先介绍基于信号水印的无线网络物理层认证的框架,包含了信号模型、信道估计、消息恢复和消息认证等基本知识,其次阐述基于信号水印的无线网络物理层框架在几种典型无线网络中的发展现状,最后综述无线网络物理层认证方案的性能评估方法。

Identity-based network attack, as a commonly-used attacking means, would greatly reduce the performance of wireless networks, and how to solve the security-authentication problem in the physical layer now becomes a research hotspot. By referencing Using the digital watermarking idea in the image, the wireless network physical-layer watermark signal or fingerprint would be a mechanism by which the secret security authentication code or label is for transmitted together with the main transmission message, with strong security and no consumption of extra bandwidth. Firstly, the wireless network physical-layer authentication framework based on signal watermarking is presented, including the basic knowledge of signal model, channel estimation, message recovery and message authentication. Then, the development situation of wireless network physical-layer authentication framework based on signal watermarking in several typical wireless networks is discussed. Finally, the performance evaluation methods of physical layer authentication schemes for wireless networks are overeviewed.