Message encryption method by means of wireless physical layer information

An encryption method and information encryption technology, which is applied in wireless communication, security devices, digital transmission systems, etc., can solve the problem of complex overhead of the generation mechanism, and achieve the effects of reducing pilot overhead, easy implementation, and strong concealment

Active Publication Date: 2017-04-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Using wireless physical layer channel information to encrypt messages, although it can enhance the security of message transmission in existing research, its generation mechanism and additional overhead will be very complicated

Method used

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  • Message encryption method by means of wireless physical layer information
  • Message encryption method by means of wireless physical layer information
  • Message encryption method by means of wireless physical layer information

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Embodiment Construction

[0030] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0031] The message encryption method of the present invention comprises:

[0032] figure 2 , image 3 It is the working flow chart of the user end and the base station end of the present invention, which shows that when the end user communicates with the base station, the base station sends a pilot message to the user, and the user restores the channel information through the pilot signal and compares the correlation with the last recorded channel information sex:

[0033] 1) If the correlation between the two channel information is not less than a certain threshold, the user terminal believes that the channel has basically not changed, and the terminal performs conventional communication with the base station;

[0034] 2) If the correlation between the two channel information is less than a certain threshold, the user terminal considers tha...

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Abstract

The invention provides a message authentication method by means of wireless physical layer information. In the communication process of a base station with a user, the base station sends the pilot frequency to the user, after determining the uncertainty of the channel between the base station and the user according to the pilot information, the user makes the transmitted corresponding bit message be the zero-forcing pre-code, the user side and the base station store the message as a secret key set after receiving the signal, and after the user side finds that the channel information is changed, the user takes the transmission length as the information length in the secret key set and the uncertainty of the current channel change as the message in the next secret key set and transmits the message to the base station, so that the effects of message encryption and secret key storage can be achieved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication security, and in particular relates to a message encryption method using wireless physical layer information. Background technique [0002] With the continuous development of wireless communication technology, the current fourth-generation mobile communication (4G) will not be able to meet the needs of high-density terminals. Due to the closed nature of the wired network framework, the openness of wireless communication in the air interface transmission process can easily obtain the message sent by the message sender as long as there is an eavesdropper within the communication range. In future communications, with the continuous increase of network terminals, a large amount of data will be exposed to air interface transmission. However, due to the high density of terminals, the cost of identifying eavesdropping devices is greatly increased. Therefore, in terms of message transmiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/02H04W12/04H04L1/00H04W12/03H04W12/0433
CPCH04L1/004H04L1/0076H04W12/02H04W12/04
Inventor 杨志周世东
Owner TSINGHUA UNIV
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