利用神經網絡的聯想和記憶功能，將密鑰嵌入用戶的虹膜特征中，給出了一種安全、
方便的密鑰管理新方案。存貯密鑰時，利用虹膜特征碼和一些隨機序列訓練廣義回歸神經網，使其輸入用戶虹膜特征碼時輸出一個特定的二進制序列，再將用戶密鑰與該二進制序列異或。用戶只需保存異或所得的結果和訓練好的神經網絡參數即可，無需保存或記憶密鑰。當需要獲取密鑰時，用戶再次輸入自己的虹膜圖像，系統即可利用存貯的信息恢復出密鑰。攻擊者即使獲得了存貯的信息也不能得到密鑰或用戶的虹膜特征信息。
關鍵詞:虹膜特征；密鑰管理；廣義回歸神經網絡；哈爾小波
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