Fingerprint detail information hiding and recovering method based on set polynomial conversion and harmonics

Abstract

The invention discloses a fingerprint detail information hiding and recovering method based on set polynomial conversion and harmonics. According to the basic thinking, a triangular quantization expression with displacement and rotation invariance is built through the Delaunay triangulation algorithm on the basis of fingerprint detail characteristics, so that a characteristic polynomial is built on a quantization expression set, assessment elements of non-characteristic space are introduced by means of the harmonics thinking of the set, and information hiding and verification recovering of the fingerprint detail characteristics are achieved. The method overcomes the defect that a finger template of an intelligent card stores information with plaintext and is attacked easily, improves system safety, effectively protects privacy of the biological characteristics of fingers of a user, and can be widely applied to a plurality of application scenarios like passports, identification cards and entrance guard cards.

Description

technical field [0001] The invention relates to information security technology, in particular to a method for hiding and recovering fingerprint detail information based on triangular circumscribed circle and modulo calculation. 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) check authentication and token-based (such as identity card) check authentication. The serious defect of password authentication is that it is easy to be forgotten, guessed and attacked by others; the problems of token are easy to lose, inconvenient to carry, embezzled and subjected to forgery attacks, etc. These problems will lead to leakage, attack and illegal infringement of user identity and privacy. Once a hacker cracks the password or obtains the token, this kind of problem is inevitable. Therefore, biometric-based ...

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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