抵抗密文攻击的光学图像加密方法

Optical image encryption method against ciphertext attack

当前光学图像加密无法抵抗各种攻击,使得光学图像的安全性差,为了解决当前光学图像加密过程中存在的一些难题,保护光学图像中的信息,获得更加理想的光学图像加密效果,提出了一种用于抵抗密文攻击的光学图像加密方法。首先采集光学图像,并对光学图像进行预处理,然后利用光学隐藏技术隐藏图像信息,并根据重要信息和随机相位得到光学图像加密密钥,根据密钥进行光学图像加密传输操作,最后与其他方法进行了光学图像加密对比测试,结果表明:本方法的分数阶均方误差在0.1左右,光学图像加密方法可以抵抗各种非法攻击,无法从加密后光学图像得到原始光学图像的信息,提高安全性,具有定的实际应用价值。

The current optical image encryption can not resist various attacks, which makes the security of optical image poor. In order to solve some problems existing in the current optical image encryption process, protect the information in optical image and obtain more ideal optical image encryption effect, an optical image encryption method for resisting ciphertext attack is proposed. Firstly, the optical image is collected and preprocessed, then the optical hiding technology is used to hide the image information, and the optical image encryption key is obtained according to the important information and random phase. The optical image encryption transmission operation is carried out according to the key. Finally, the optical image encryption is compared with other methods, The results show that the fractional mean square error of this method is about 0.1. The optical image encryption method in this paper can resist various illegal attacks, and can not obtain the information of the original optical image from the encrypted optical image. It is safe and has certain practical application value.