一种单因子的可撤销生物特征认证方法

将令牌化随机数作为外部因子的双因子可撤销生物特征认证方法存在令牌泄露、丢失等安全威胁. 本文提出了一种生物特征作为唯一输入的解决方法, 即单因子的可撤销生物特征认证方法. 首先, 利用扩展的特征向量, 通过预定义的滑动窗口和哈希函数随机化生成二进制种子; 然后替换不同的辅助数据来生成可撤销模板; 最后, 由查询生物特征向量对辅助数据进行解码, 提高了性能和安全性. 在指纹数据库FVC2002和FVC2004的实验结果表明, 该方法不仅满足可撤销生物特征识别的4个设计标准, 同时防御了3种安全攻击.

One-factor Cancellable Biometrics Verification Scheme

Two-factor cncellable biometrics use tokenized random number as an external factor, however, tokenized factor incurs severe security and privacy threats. In this paper, we propose a one-factor cancellable biometrics scheme, which requires sole biometric as input. First, it exploits an expanded feature vector, generating seeds of randomized binary auxiliary data by sliding a pre-defined window and Hash function, which enhances performance and security. Then, the cancellable template hence can be generated by replacing different binary auxiliary data. Finally, the auxiliary data is decoded by using sole query biometric. The experiments have been conducted on FVC2002 and FVC2004 databases, and results show that the scheme does not only fulfill four design criteria of cancellable biometrics but also resist to the threat model that enclosed three security attacks.