The unalterable nature of fingerprint biometrics leads to permanent identity loss of a user if an original fingerprint template is compromised. Moreover, it is evident in the literature that reconstructing a fingerprint image from an original fingerprint template is a feasible task. In order to protect the fingerprint template, we propose a noninvertible and alignment-free fingerprint template protection technique by exploiting the pair-polar minutiae structures. In the proposed technique, a secure fingerprint template is generated in the form of a set of binary vectors. These vectors are computed from the many-to-one mapping of the transformed pair-polar coordinates into a 3-D grid. Results of the proposed technique are analyzed in terms of revocability, unlinkability, security, and performance on six publicly available databases of Fingerprint Verification Competition 2002 and 2004. The overall analysis of the results clearly shows the effectiveness of the proposed technique as compared to the existing state-of-the-art techniques.

中文翻译：

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采用双极性结构计算安全且免对齐的指纹模板


如果原始指纹模板遭到破坏，指纹生物识别技术的不可更改性将导致用户的身份永久丢失。此外，文献表明从原始指纹模板重建指纹图像是一项可行的任务。为了保护指纹模板，我们通过利用对极性细节结构提出了一种不可逆且免对齐的指纹模板保护技术。在所提出的技术中，安全指纹模板以一组二进制向量的形式生成。这些向量是根据转换后的极坐标对到 3D 网格的多对一映射计算得出的。在 2002 年和 2004 年指纹验证竞赛的六个公开数据库上，对所提出的技术的结果进行了可撤销性、不可链接性、安全性和性能方面的分析。结果的总体分析清楚地表明了所提出的技术与现有技术相比的有效性。最先进的技术。