Physical layer label signal embedding authentication method and system based on WFRFT

Abstract

The invention belongs to the technical field of wireless communication networks, and discloses a physical layer label signal embedding authentication method and system based on WFRFT. The method comprises the following steps: carrying out signal detection of legal receiving and sending parties; processing the received signal, and extracting equivalent phase information of a legal receiving party and a legal transmitting party by using a channel phase response to form a two-party agreed key; generating a label signal and then carrying out message reconstruction; disturbing a signal constellation through mixed carrier modulation of WFRFT, and jointly encrypting a message and a secret key. According to the method, equivalent phases are extracted through mutual detection of two legal parties to form an agreed secret key, message reconstruction is carried out after a label signal is generated, a signal constellation is disturbed through mixed carrier modulation of WFRFT, and common encryption of a message and the secret key is achieved. According to the method, the resource space of the upper layer is greatly saved, the transmission efficiency and the overall performance of the system can be improved, the identity authentication security can be improved, and a new thought can be provided for physical layer security authentication.

Description

technical field [0001] The invention belongs to the technical field of wireless communication networks, and in particular relates to a WFRFT-based physical layer label signal embedding authentication method and system. Background technique [0002] With the continuous development and improvement of communication technology and the complexity of message transmission media, the security of wireless communication networks has gradually become one of the main issues considered by researchers. In order to prevent eavesdropping attacks by malicious nodes in the network and ensure the normal transmission of messages, security authentication methods have emerged as the times require. The identity attack against the internal communication network is the main method among many attack methods, and it is also the first step for malicious nodes to launch an attack. Due to the expansion of the network structure, the hidden dangers of wireless network security no longer exist only at the ...

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Problems solved by technology

[0005] (1) At present, security authentication schemes are mostly carried out on the network layer. For special networks such as battlefield networks, the resource space available on the network layer is extremely limited. Setting the security authentication scheme on the network layer will undoubtedly cause a certain waste of upper-layer resources. , the overall efficiency of the system decreases

[0006] (2) The current research on physical layer authentication is mainly realized by using the physical characteristics of the transmission signal. The physical characteristics of the signal are relatively fixed and easy to be obtained by illegal eavesdroppers.

[0007] The difficulty in solving the above problems and defects is: how to dynamically adjust the physical characteristics of the communication signal without increasing the power of the transmitter, so that the signal characteristics can change in real time according to the channel environment, so that the illegal eavesdropper cannot obtain real-time signals information

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