基于指纹多生物特征的安全身份认证方案

摘要

由于多生物特征身份认证的安全稳定性,美国司法部引入指纹汗孔信息来帮助身份认证.然而指纹汗孔信息的泄露可以充分还原出指纹纹路信息.本文提出一种保护指纹汗孔等个人隐私信息的方案.方案采用高分辨率指纹仪提取带有汗孔的指纹数字图像,使用指纹细节点进行预对齐,指纹汗孔进行密钥绑定.现有的模糊金库方案在应用上都假设指纹预先对齐或采用一些准确率不高的对齐方法,本文首次将指纹第三层汗孔信息与模糊金库方案相结合.%As multi-biometric feature identification can get higher accuracy,the U.S.department of justice launched the next generation identification (NGI) project which will add the fingerprint pore information to help the identification.However,the leaking of personal fingerprint pore information can make it easy to restore the fingerprint ridges.The paper presents a scheme which can protect personal private pore information.The scheme uses high-resolution fingerprint scan device to capture fingerprint digital image with pores,aligns fingerprints by using minutiae,and binds key by using pore.Existing Fuzzy Vault scheme assumes fingerprints are pre-aligned or uses inaccurate methods to align fingerprints.The paper firstly combines fingerprint level3 information with Fuzzy Vault scheme.