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Design method based on fingerprint feature revocable template protection technology

A fingerprint feature and technology design technology, applied in the field of revocable template protection based on fingerprint features, can solve the problem of not obtaining original fingerprint features, and achieve the effect of preventing tracking and protecting privacy.

Active Publication Date: 2021-11-02
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a design method based on fingerprint feature revocable template protection technology to solve the problem of how to ensure that the user's original fingerprint feature is not acquired when the feature template is lost or leaked in the fingerprint identification system, and at the same time it can be quickly updated Generate fingerprint feature templates to ensure the identity authentication function of the fingerprint recognition system

Method used

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  • Design method based on fingerprint feature revocable template protection technology
  • Design method based on fingerprint feature revocable template protection technology
  • Design method based on fingerprint feature revocable template protection technology

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Embodiment

[0044] Such as figure 1 As shown, this embodiment proposes a design method based on fingerprint feature revocable template protection technology, including the following steps:

[0045] S1, generate a revocable template:

[0046] S11, perform fingerprint feature extraction on registered fingerprints to obtain minutiae points, and generate a minutiae point set V through coordinate system transformation and screening; specifically:

[0047] S111, after performing image enhancement and thinning operations on the registered fingerprint, minutiae points are extracted; each minutiae point is recorded as m i ={x i ,y i ,θ i}, where i represents the serial number of the detail point, x i Indicates the abscissa of the i-th detail point, y i Indicates the ordinate of the i-th detail point, θ i Indicates the angle of the i-th minutiae point; the set of all minutiae points is n is the number of detail points;

[0048] S112, randomly select a detail point m i ={x i ,y i ,θ i}...

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Abstract

According to the invention, an irreversible and changeable function or parameter is designed based on fingerprint features and a coding algorithm to encrypt fingerprint information, an original fingerprint feature template is converted into a conversion template, and a fingerprint feature revocable template is generated. The matching degree between the revocable templates is low, and the possibility that original fingerprint features are recovered through cross matching of the fingerprint feature templates of the same fingerprint feature transformation is avoided; and through the irreversible design of the cryptographic algorithm, even if an attacker obtains the revocable template in the fingerprint identification system, the original fingerprint features of the user cannot be recovered through the revocable template. Therefore, the revocable template protection technology designed by the invention has security, can protect the original fingerprint feature information of the user from being stolen and lost, can protect the privacy of the user identity, and can prevent the user identity information from being tracked.

Description

technical field [0001] The invention relates to the technical field of fingerprint recognition security, in particular to a design method of a revocable template protection technology based on fingerprint features. Background technique [0002] At present, the revocable template protection technology is mainly divided into three categories: biological hash algorithm, template deformation technology, theory and method based on auxiliary data. [0003] (1) The basic idea of ​​the biological hash algorithm is to use the wavelet Fourier transform feature of the fingerprint image and a set of pseudo-random numbers in the user's identity token to perform iterative inner product to generate the user's binary sequence, and to achieve the identity by comparing the binary sequence purpose of certification. However, because the highly distinguishable fixed-length features required by the algorithm itself are difficult to extract from fingerprints, the authentication performance cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06F21/60G06F21/62G06N3/04G06N3/08
CPCG06F21/602G06F21/6245G06N3/084G06N3/044G06N3/045
Inventor 李佳楠张春杨杨如昌陈卫涛
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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