为了满足5G应用场景对高安全性消息认证协议的迫切需求，本课题以物理层安全技术为线索，探索可达无条件安全的基于信道预编码的高效物理层多消息认证理论与关键技术。首先，针对现有基于信道预编码认证缺乏适用的认证模型的问题，建立一个新的基于信道预编码的认证模型，并探索该模型下一个认证协议可达无条件安全的充分必要条件。其次，针对现有基于信道预编码的认证大多依赖于无法实现的随机编码方案，且LDPC码和Polar码被分别遴选为5G的长码和短码编码标准，拟在多种窃听信道模型下，利用Large-girth-LDPC码和Polar的编码思想分别设计出低编码和解码复杂度的强安全LDPC码和强安全Polar码编码方案，并结合轻量级的一致均匀哈希函数类设计出多种窃听信道模型下出高效的、高安全性的物理层认证协议。最后，拟利用Matlab仿真和USRP平台验证上述协议的性能，并拟设计相应的物理硬件来实现上述协议。

Next generation (5G) wireless networks are expected to support a wide range of services/use cases with distinct requirements (such as, cost-effective, flexible, and security). To meeting the high-level security requirement in many 5G network scenarios, in this project, the design of channel precoding based physical layer messages authentication protocols with perfect security by using physical layer security technology is the main thought. .Firstly, for the lack of channel precoding based authentication model over wiretap channel, a new authentication model with channel precoding techniques will be proposed, and the necessary and sufficient condition for the security of an authentication protocol will be studied under the proposed authentication model. .Secondly, since (1) the existing physical layer based message authentication protocols cannot be efficiently implementable in practice as both of them are based on random coding techniques; (2) LDPC Codes and Polar Codes are have been accepted by 5G standard for data channel and control channel, respectively. In this project, an LDPC code based multi-message authentication scheme with high efficiency and perfect security will be presented for different wiretap channel models by leveraging a novel and lightweight ϵ -almost-universal hash function family and the dual of large girth LDPC codes. Moreover, a Polar code based multi-message authentication scheme with high efficiency and perfect security will be presented with strong secure Polar codes for different wiretap channel models..Thirdly, the experimental results with Matlab and USRP will be provided to demonstrate if the proposed schemes can achieve high authentication rate with low time latency. Moreover, the project also proposes new application solutions for physical message authentication between wireless terminal device by designing the corresponding physical hardware.