A method of physical layer security authentication(PLSA)is proposed to solve the high complexity of existing authentication method in wireless communication. Firstly the characteristics of reciprocity and uniqueness of the wireless channels of two sides are utilized
and the highly correlated but not completely consistent channel characteristic sequences are extracted by estimating the channel responses. Then the security authentication coding is proposed based on the principles of security and channel coding of information theory. At last
the physical layer security authentication framework that does not need cryptographic algorithm is established. The security analysis of the physical layer authentication method is carried out by using the theory of typical set and the wiretap channel model. It is found that when the length of the codebook tends to infinity
the upper bound and the lower bound of the attack tend to be consistent. It proves that the physical layer security authentication is feasible. Simulation results show that the performance of the proposed method is better than that of the traditional authentication method when the amount of security mutual information exceeds 64 bits.
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