Fingerprint Details Information Hiding and Restoration Method Based on Orthogonal Matrix and Modulo Operation

Abstract

The invention discloses a fingerprint detail information hiding and restoring method based on orthogonal matrix and modular arithmetic. According to the method, fingerprint detail characteristic information is divided into fingerprint detail point position coordinate information and fingerprint detail point direction information, and through the utilization of a random transformed orthogonal matrix of a sub-secret-key of a password secret key, matrix transformation arithmetic of the password secret key and position information is achieved to protect the fingerprint detail point position coordinate information. Through the utilization of the other sub-secret-key of the password secret key, modular arithmetic of the password secret key and direction information is achieved to protect the fingerprint detail point direction information. The fingerprint detail information hiding and restoring method based on the orthogonal matrix and modular arithmetic overcomes the defects that a fingerprint template easily receives attacks inside a system or attacks outside the system, and the fact that fingerprint characteristics become invalid is caused. By the further utilization of the combination of the dual authentication of the password secret key and the fingerprint characteristics, safety of a protected system and privacy of fingerprint characteristic data are improved.

Description

technical field [0001] The invention relates to the fields of computer technology, network security technology, digital image processing technology and data storage technology, in particular to a method for hiding and restoring fingerprint detail information based on orthogonal matrix and modular operation. Background technique [0002] Offline or online systems require precise knowledge of the identity of system users to ensure data security. The current relatively safe and reliable identity authentication systems are mainly based on tokens (such as identity cards) or knowledge (such as passwords or PIN codes). The fatal flaw of tokens is that they are easy to lose, counterfeit, and inconvenient to carry; while knowledge (such as passwords) is easily forgotten, confused, and extremely vulnerable to social engineering attacks. These problems lead to the inability of token or knowledge-based authentication systems to distinguish genuine legitimate user owners from impersonat...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to overcome the deficiency 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 authentication of the password key and the fingerprint feature to solve the privacy of the fingerprint template Fingerprint Details Information Hiding and Recovery Method Based on Orthogonal Matrix and Modular Operation and Security Issues

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