A Message Encryption Method Utilizing Wireless Physical Layer Information

An encryption method and information encryption technology, applied in wireless communication, digital transmission system, error prevention and other directions, can solve the problem of complex extra overhead of the generation mechanism, and achieve the effect of reducing pilot frequency overhead, easy to implement, and strong concealment

Active Publication Date: 2019-09-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Message Encryption Method Utilizing Wireless Physical Layer Information
  • A Message Encryption Method Utilizing Wireless Physical Layer Information
  • A Message Encryption Method Utilizing 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 is a message authentication method using wireless physical layer information: the purpose is that during the communication process between the base station and the user, the base station sends pilot information to the user, and the user determines the channel uncertainty between the base station and the user according to the pilot information Finally, do zero-forcing precoding for the corresponding bit message sent. After receiving the signal, the user terminal and the base station store this message as a key group. The information length in and the uncertainty of this channel change are sent to the base station as the information in the next key group, so as to achieve the effect of message encryption and key storage.

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 Patents(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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