Unlock instant, AI-driven research and patent intelligence for your innovation.

Cepstrum-based channel characteristic and equipment physical fingerprint separation method and device

A technology of physical fingerprints and channel characteristics, applied in the field of information security, can solve the problems of difficult separation of signal distortion, influence of physical fingerprint characteristics of equipment, etc., to achieve the effect of improving channel robustness

Active Publication Date: 2020-06-09
SOUTHEAST UNIV +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the signal distortion caused by the wireless channel and the signal distortion caused by the physical fingerprint of the device are difficult to separate
Furthermore, since the signal change caused by the wireless channel is greater than the physical fingerprint of the device, when the transmitter passes through different wireless channels, the channel influence will have a great impact on the extraction of the physical fingerprint feature of the device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cepstrum-based channel characteristic and equipment physical fingerprint separation method and device
  • Cepstrum-based channel characteristic and equipment physical fingerprint separation method and device
  • Cepstrum-based channel characteristic and equipment physical fingerprint separation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] This embodiment provides a cepstrum-based method for separating channel features and device physical fingerprints. This method is performed by the receiver. Therefore, before introducing this method, the processing performed by the transmitter is first introduced.

[0046] From the perspective of digital signals, the preamble signal s of the transmitter is a signal composed of 8 spreading codes of zero symbols:

[0047] s=[s 1, ,s 2 ,...,s 8 ]

[0048] Wherein, the transmitter may be ZigBee or other devices, as long as there is a repeated sequence in the transmitted preamble signal. The spreading code of the preamble signal s is the same, that is, s 1 =s 2 =...=s 8 , the preamble signal s passes through various components of the transmitter, specifically crystal oscillators, mixers, amplifiers, filters, power amplifiers, antennas, etc., and the preamble signal transmitted from the transmitter antenna contains the physical feature fingerprint information of the dev...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a cepstrum-based channel characteristic and equipment physical fingerprint separation method and device. The method comprises the following steps: (1) receiving a signal transmitted by a target transmitter, and carrying out down-conversion on the received signal to obtain a baseband signal; (2) preprocessing the baseband signal, and extracting a preamble signal, wherein thepreamble signal comprises eight preamble symbols; (3) performing FFT (Fast Fourier Transform) on each preamble symbol to obtain a frequency domain signal of each preamble symbol; (4) performing log operation transformation on the frequency domain signal of each preamble symbol to obtain a cepstrum domain signal of each preamble symbol; (5) subtracting the cepstrum domain signal of a first preamble symbol from the cepstrum domain signals of second to eighth preamble symbols to obtain seven cepstrum domain preamble signal differences, and completing channel feature and equipment physical fingerprint separation; and (6) taking the seven cepstrum domain preamble signal differences as equipment physical fingerprints for equipment identity authentication. According to the method, the channel characteristic influence can be eliminated, and the robustness is improved.

Description

technical field [0001] The invention relates to the field of information security, in particular to a cepstrum-based separation method and device for channel characteristics and device physical fingerprints. Background technique [0002] The physical fingerprint feature of the device refers to the slight distortion of the transmitted signal caused by the power difference of the internal hardware components of the device. It is as unique and unclonable as a human fingerprint. Therefore, this feature is also called a physical fingerprint feature or a radio frequency fingerprint feature, so it can be used for identification and authentication of electromagnetic radiation sources. Specifically, the device identification technology based on physical fingerprint features can accurately distinguish wireless devices that use the same frequency, bandwidth, and modulation method, and has very good practical value. Therefore, the authentication system based on the physical fingerprin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/69H04W12/00H04W12/06H04W12/79
CPCH04B1/69H04W12/06H04W12/79
Inventor 胡爱群邢月秀李古月
Owner SOUTHEAST UNIV