A physical layer authentication method based on multi-carrier transmission

Abstract

The invention discloses a physical layer authentication method based on multi-carrier transmission. According to the method, based on the multi-carrier transmission, channels are regarded as a set of M fading sub-channels, and the reciprocity and randomness of phase responses of the sub-channels are used for performing on identity authentication on both parties of communication. The method includes the implementation steps that Alice transmits an excitation signal to Bob, the phase difference of the multi-carrier channels is measured after Bob receives the excitation signal, then Bob transmits a signal where a shared secrete key is packaged to Alice, and Alice authenticates whether the signal is from Bob or not according to the received signal and the shared secrete key. According to the authentication process of the method, the characteristics of the phase responses of the channels are used, and kinds of spoofing attacks such as the interference attack, the replay attach, impersonation attack are effectively resisted.

Description

technical field [0001] The invention relates to a physical layer security authentication method based on multi-carrier transmission, which belongs to the technical field of wireless communication. Background technique [0002] With the rapid development of wireless communication and the growth of services based on mobile terminals, the security of wireless networks has attracted much attention. Since the openness of the wireless communication link provides some new ways for illegal users to attack, the communication system has great security risks, and it is easy for illegal users to steal useful information. Traditional information security communication is mainly related to encryption technology based on cryptography. Since the length of the key is limited, and with the rapid development of computer technology, the computing power of the computer is rapidly increasing. For this encryption method, it is possible to use Guessing, experimenting and performing a large number ...

AI Technical Summary

Problems solved by technology

The authentication based on the physical layer is generally implemented by password security mechanism and security protocol, and the password security mechanism has the risk of key leakage, and the security protocol usually has security flaws, so there is no protection network of physical layer authentication, and the security of the wireless communication system Sexuality is dangerous

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