A fingerprint encryption method based on a fusion feature descriptor

Abstract

The invention belongs to the technical field of fingerprint encryption fusion in information security and mode recognition, and discloses a fingerprint encryption method based on a fusion feature descriptor. The method comprises: firstly, constructing a registration-free feature descripto, wherein the descriptor is composed of three parts, namely a fingerprint detail point direction field featuredescriptor, a fingerprint detail point local structure descriptor and a ridge line counting feature descriptor; Then storing the descriptor into Helper Data for encryption domain matching of a fingerprint encryption algorithm; Binding the fingerprint feature information with a secret key by using a Fuzy Valert algorithm, and adding a hash point to generate a Valert; And when the user needs to carry out verification, calculating a matching score between the query fingerprint and the Helper Data generated by the registration fingerprint, carrying out encryption domain matching with the registration fingerprint, and finishing a fingerprint encryption and decryption process. According to the invention, the traditional error caused by inaccurate registration is avoided, and the matching precision of the fingerprint encryption technology is improved.

Description

technical field [0001] The invention belongs to the technical field of fingerprint encryption fusion in information security and pattern recognition, and in particular relates to a fingerprint encryption method based on fusion feature descriptors. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: biometric encryption technology aims to organically integrate biometric identification and encryption technology, give full play to the advantages of each technology, reduce the pressure on key management, and provide stronger security for private information protection and control. Fingerprint encryption technology is the complementary of fingerprint identification technology and encryption technology. Its principle is to fuse fingerprint information and key information together securely. This technology takes into account the fuzziness of fingerprint identification and the accuracy of encryption technology, ensuring t...

AI Technical Summary

Problems solved by technology

The number of detail points and the accuracy of the final matching still need to be improved

[0005] (2) Existing technology 3, fingerprint deformation and the absence of a single real minutiae have a great impact on the matching accuracy of the encrypted domain, which is specifically reflected in the structure based on minutia, which will cause destructive calculations due to the lack of a single minutiae, which obviously affects the identity Verified Accuracy

[0006] Difficulty and significance of solving the above technical problems: Although Helper Data of the above-mentioned fingerprint encryption schemes solves the matching problem of fingerprint encryption algorithms to a certain extent, there are still major deficiencies in the recognition accuracy and security strength.

Images