Packet level wireless device authentication method based on channel state information

Abstract

The invention provides a packet level wireless device authentication method based on channel state information, and belongs to the technical field of wireless device security. The method comprises two stages of authentication during access and packet-by-packet authentication during communication: when wireless equipment requests access, authentication equipment enters an 'access' authentication mode; firstly collecting a CSI fingerprint of to-be-authenticated equipment, and then authenticating the equipment according to a standard deviation of a fingerprint set; if the authentication fails, refusing to access, and if the authentication succeeds, entering a communication authentication mode, and training a local authenticator by using a CSI fingerprint set; whenever a new data packet is received, enabling the authentication equipment to extract the CSI from the new data packet and input the CSI to the local authenticator for fingerprint matching; and if matching succeeds, accepting the data packet, otherwise, discarding the data packet. The invention provides a non-cryptographic authentication method for an access stage and a communication stage, the non-cryptographic authentication method is generally used for a wireless network based on an OFDM (Orthogonal Frequency Division Multiplexing) technology, and meanwhile, an improved integrated authenticator has high authentication time efficiency and accuracy and can be used for packet-level authentication.

Description

technical field [0001] The invention belongs to the technical field of wireless device security, in particular to a packet-level wireless device authentication method based on channel state information. Background technique [0002] The development of wireless communication technology has brought great convenience to social production and people's life. Compared with the wired network, the wireless network effectively solves the "last hundred meters" problem in the Internet by virtue of its low cost and convenience. However, the existence of attackers seriously threatens the security of wireless networks. They use eavesdropping, interception, identity forgery and other illegal means to obtain huge profits. Therefore, it is particularly important to use device authentication technology to control the behavior of wireless devices. [0003] In recent years, scholars at home and abroad have proposed many wireless device authentication schemes based on channel fingerprints. The...

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Problems solved by technology

[0006] Purpose of the invention: In order to overcome the problems of outdated authenticator and low efficiency of authentication time in the existing authentication technology, the present invention provides a packet-level wireless device authentication method based on channel state information, which is used to solve the problem that the existing authentication technology cannot The problem of maintaining high accuracy and low authentication time efficiency in long-term work makes it impossible to perform packet-level authentication in high-throughput wireless networks

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