基于指纹特征数字水印算法的身份认证技术研究

Authentication Based on Fingerprint Feature Watermarking Algorithm

本文利用指纹特征信息生成数字水印信号 ,并隐藏在身份证件之中 .以身份证件作为指纹信息的载体 ,取代了传统指纹识别系统中的指纹特征参考信息数据库 ,提高整个自动指纹识别系统 (AFIS)的安全性 .同时 ,嵌入指纹特征信息的身份证件与用户存在本质联系 ,防止证件被盗用 ,实现对证件的保护 .实验证明 ,使用含水印的证件在保证指纹识别系统正常工作的前提下 ,提高了验证的安全性 。

This paper introduces an application of biometric watermarking algorithm based on the fingerprint minutiae data in Automated Fingerprint Identification system (AFIS).The reference copy of the fingerprint minutiae data is embedded in a host image that is the digital copy of the personal identification paper,such as ID card.The biometric data is hidden in every corresponding personal identification paper,instead of storing in the biometric database,which greatly promotes the security of AFIS.This algorithm is also robust to the JPEG compression and geometric distortion.Furthermore,the fingerprint data provides an additional cue in authenticating the personal identification paper.Experimental results show that authentication with more security is performed provided that the identification system works effectively using the watermarked identification card,and the algorithm is robust to some attacks.