基于指纹细节点的可撤销比特串模板生成算法

Cancelable bit strings template generation algorithm based on fingerprint minutiae

针对指纹模板算法安全性能较低的问题,给出了一种基于指纹细节点的可撤销比特串模板生成算法。在对指纹图像进行预处理后,提取指纹全部细节点特征,进行量化和映射生成比特串模板,结合用户PIN码生成可撤销指纹模板,提高了算法的安全性。在指纹数据库FVC2002-DB1和DB2上的实验表明,改进的算法具有更好的安全性和认证性能,满足可撤销性、多样性和不可逆性。

In order to solve the problem of low security performance of fingerprint template algorithm,this paper designed a generation algorithm of cancelable bit strings based on fingerprint minutiae.After the preprocessing of the fingerprint image,it extracted,quantized and mapped all the minutiae of fingerprint to generate the bit strings template and combined the user PIN code to generate the cancelable fingerprint template.It improved the security of the algorihhm.The experiment results based on FVC2002-DB1 and DB2 show that the proposed algorithm has better security and authentication performance,and can satisfy the requirements of revocation,diversity and irreversibility.