一种基于虹膜特征的密钥管理方案

利用神经网络的联想和记忆功能，将密钥嵌入用户的虹膜特征中，给出了一种安全、
方便的密钥管理新方案。存贮密钥时，利用虹膜特征码和一些随机序列训练广义回归神经网，使其输入用户虹膜特征码时输出一个特定的二进制序列，再将用户密钥与该二进制序列异或。用户只需保存异或所得的结果和训练好的神经网络参数即可，无需保存或记忆密钥。当需要获取密钥时，用户再次输入自己的虹膜图像，系统即可利用存贮的信息恢复出密钥。攻击者即使获得了存贮的信息也不能得到密钥或用户的虹膜特征信息。
关键词:虹膜特征；密钥管理；广义回归神经网络；哈尔小波
Abstract: A convenient and safe key management means which based on iris biometrics is given. When the key is saved, the user’s key is integrated into the iris code by generalized regression neural networks. The user only needs to save the parameters of the trained neural network and the XOR of the key and a output of the GRNN, while both the key and the iris code are discarded. To get the key again, the user just need to sample and input his iris biometrics into the neural network, if the iris code is correct enough, the system will release the key. The system is safe, even if the attacker thieves the template, the information of the key or iris biometrics will not be betrayed.
Key words: iris biometrics; key management; GRNN; Haar wavelet