基于虹膜特征的密钥生成和AES算法的图像加密

Image Encryption Research Based on Keys Generated by Iris Feature and AES Algorithm

针对传统加密算法密钥长、记忆困难、不易安全持有等特点,提出虹膜特征密钥提取和AES加密算法相结合的图像加密算法.该算法利用db2小波分解的虹膜区域,提取第三层的虹膜关键特征高频系数,通过使用随机映射函数生成一个192位的密钥.随后将该算法与经典的Arnold算法的同时应用于图像加密实验.实验结果表明,利用该算法得到的加密图像的安全性更高.

The encryption algorithm has disadvantages like the long key making memory difficult and uneasy safekeeping,which causes a potential threat to the information security.Based on the combination of iris feature key extraction and AES encryption algorithm,this paper proposes an image encryption algorithm,The algorithm uses DB2 wavelet decomposition of the iris region,extracting the third layer of the iris key features of high frequency coefficients,through the use of random mapping function to generate a 192 bit key.The algorithm and the classical Arnold algorithm are applied to image encryption experiments at the same time.Experimental results show that the security of the encrypted image is higher by using the algorithm.