PHYSICAL LAYER AUTHENTICATION METHOD AND SYSTEM BASED ON OPTIMAL SECRECY PROTOCOL

摘要

The present disclosure relates to a physical layer authentication method based on an optimal secrecy protocol, characterized in that the method comprises: a transmitting end transmitting a marking signal to a wireless channel based on an optimal secrecy protocol, wherein the marking signal comprises an authentication signal and an information signal, and in the optimal secrecy protocol, a receiving end feeding a signal-to-noise ratio threshold value back to the transmitting end, and optimizing an energy distribution factor of the information signal and the signal-to-noise ratio threshold value; the receiving end receiving the marking signal, feeding the signal-to-noise ratio threshold value back to the transmitting end based on the optimal secrecy protocol, processing the marking signal, and obtaining a confidential authentication probability; obtaining an authentication request transmission probability and a secret authentication rejection probability based on a signal-to-interference and noise ratio of the received information signal; and calculating a confidential authentication efficiency based on the confidential authentication probability, the authentication request transmission probability and the secret authentication rejection probability to determine a secrecy level of physical layer authentication, and acquiring a maximum value of the confidential authentication efficiency according to the optimized signal-to-noise ratio threshold value and the optimized energy distribution factor.