基于生物特征识别的门限身份认证方案

在传统生物特征身份认证系统中，针对重要目标的保护时，单一用户的身份认证方案存在用户权限过高的问题。为了解决此类问题，利用BGN半同态加密算法，结合Shamir秘密共享设计了一种基于生物特征识别的门限身份方案。主要使用在双线性对上BGN同态加密算法进行数据保护，利用第三方认证中心进行秘密分割，服务器在密文状态下对用户的身份进行认证，实现门限身份认证。通过性能分析验证了方案的安全性和高效性。

Threshold identity authentication scheme based on biometrics

In the traditional biometric identity authentication system, for the protection of important targets, the single user identity authentication scheme has the problem of excessive user authority. In order to solve such problems, this paper used the BGN semi-homomorphic encryption algorithm and Shamir secret sharing to design a threshold identity authentication scheme based on biometrics. This scheme mainly used the BGN homomorphic encryption algorithm on the bilinear pair for data protection, and used a third-party authentication center for secret division. The server authenticated the user''s identity in the ciphertext state to achieve threshold identity authentication. Through the performance analysis of the scheme, the safety and efficiency of the scheme are verified.