Method for improving security of fuzzy fingerprint safe
A safe and security technology, which is applied in the direction of public keys, character and pattern recognition, instruments, etc. in secure communication, can solve problems such as hidden safety hazards, achieve enhanced security, enhanced security, and avoid leakage Effect
Inactive Publication Date: 2012-08-22
INST OF AUTOMATION CHINESE ACAD OF SCI
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Problems solved by technology
[0006] To sum up, as a fuzzy safe technology to protect the security of biometric templates and user keys, it also has certain security risks.
Method used
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[0113] This method has been applied to a self-designed secure fuzzy encryption identity authentication system based on fingerprints. Adopt object-oriented design method and software engineering norms, realize with C++ language, the platform of system development is Windows XP SP2+Visual Studio 2005, all experiments are carried out on the PC of Intel Core2 1.86G CPU.
[0114] 1) Fingerprint test database
[0115] The second international fingerprint identification competition FVC2002 DB2 SetA database is used for testing. This database is an optical database of model FX2000 produced by Biometrika Company, with an image resolution of 569dpi and an image size of 296×560 pixels. The database is collected from 100 fingers, each finger has 8 images, a total of 100×8=800 fingerprint images. We selected the first two samples of each finger for testing (a total of 100×2=200 fingerprints), because the fingerprint deformation of these two samples is relatively small, which is convenient...
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The invention discloses a method for improving security of a fuzzy fingerprint safe. The method comprises the following steps of: A, according to direction information of local ridge lines of fingerprint detailed points, constructing a direction vector corresponding to a ridge line sampling point of each detailed point, and deriving a fixed value corresponding to each detailed point according to the direction vector; B, by using the fixed values of the detailed points as inputs of a deformation function, obtaining translation parameters and rotation parameters of the fingerprint detailed points, and then obtaining a deformed fingerprint detailed point template; C, extracting topological structure information of the detailed points in a neighboring area of fingerprint singular points, and using the extracted topological structure information as the registering help information; and D, storing the deformed detailed point template and the topological structure information of the detailedpoints in the singular point neighboring area in the fuzzy safe, and conducting encoding and decoding operation of the fuzzy fingerprint safe in a deformation area.
Description
technical field [0001] The invention relates to the technical fields of biometric feature recognition image processing, pattern recognition, cryptography, information security, etc., and especially designs a method for enhancing the security of fuzzy fingerprint safes based on minutiae local ridge line information. Background technique [0002] As biometrics are used more and more widely in real life, people are paying more and more attention to the security and privacy issues it brings. According to surveys, the public's acceptance of biometrics, especially fingerprints, is not very high. The reason is that they are worried about leaking their identity information, which will bring hidden dangers to information security. Theoretically speaking, the biometric system is more or less likely to be attacked, and the security of the biometric template is the most important. [0003] Fuzzy safe is a biometric encryption technology that can protect biometric information and user k...
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IPC IPC(8): G06K9/00H04L9/30
Inventor 田捷李鹏杨鑫
Owner INST OF AUTOMATION CHINESE ACAD OF SCI