A Fingerprint Details Information Hiding and Restoration Method Based on Set Polynomial Transformation and Harmonization

Abstract

The invention discloses a method for hiding and recovering fingerprint detail feature information based on set polynomial transformation and reconciliation. The basic idea is to construct a triangle quantization representation with displacement and rotation invariance based on the Delaunay triangulation algorithm of fingerprint detail features, so that in The characteristic polynomial is built on the quantitative representation set, and the reconciliation idea of ​​the set is used to introduce evaluation elements in the non-feature space to realize information hiding and verification recovery of fingerprint detail features. The present invention overcomes the danger of being easily attacked by the plain text storage of the fingerprint template on the smart card, not only improves the security of the system, but also effectively protects the privacy of the user's fingerprint biological characteristics, and can be widely applied to passports, ID cards, access control cards, etc. Various application scenarios.

Description

technical field [0001] The invention relates to information security technology, in particular to a method for hiding and restoring fingerprint detail information based on triangle circumcircle and modulo operation. Background technique [0002] In order to obtain the user's real identity authentication, the system data security must be fully guaranteed. The early widely used authentication mechanisms include password-based (such as password) verification authentication and token-based (such as ID card) verification authentication. The serious defect of password authentication is that it is easy to be forgotten, easy to be guessed and attacked by others; the problems of tokens are easy to lose, inconvenient to carry, stolen and attacked by forgery. These problems will lead to leakage, attack and illegal violation of user identity privacy. Once the hacker cracks the password or obtains the token, this kind of problem is inevitable. Therefore, biometric-based encryption auth...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem that the fingerprint template in the prior art is extremely vulnerable to internal or external attacks of the system, thereby causing the failure of the fingerprint feature, and to provide an organic combination of double operation authentication using the fingerprint feature polynomial transformation operation and MD5 encryption operation to solve the problem. Privacy and Security of Fingerprint Template Based on Set Polynomial Transformation and Reconciliation of Fingerprint Minutiae Feature Information Hiding and Restoration

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