摘要
利用多参数分数傅里叶变换(MPFRFT)对图像进行双随机相位加密,提供了更加丰富的密钥空间,使加密图像具有较高的安全特性。但是随机相位矩阵作为密钥占用了更多的密钥空间,给传输和解密都带来负担。本文提出将MPFRFT和ARNOLD变换相结合的加密方法,利用ARNOLD变换对给定相位矩阵进行置乱变换,再利用置乱矩阵对图像进行相位编码,然后利用MPFRFT变换进行图像加密。本文提出的加密方法不需要随机相位矩阵作为密钥随加密图像进行传输,节省了密钥空间。仿真实验表明该算法具有更小的密钥空间,同时仍然具有较高的安全特性和抗攻击能力。
The image encryption by multiple-parameter fractional Fourier transform（ MPFRFT） and double random phase encoding can provide the wider key space,and the encrypted image has the better security. However,random phase matrix,as keys for decrypting the data will be transferred with the encrypted image,which is not safe and discommodious. In this paper,we propose a new approach for image encryption based on the MPFRFT and ARNOLD transform. In the proposed image encryption scheme,a phase matrix is scrambled as random phase matrix by ARNOLD transform,and then encrypting the phase encoded image with MPFRFT. The simulations shows that the approach still has the better security and resistance to various attacks.
出处
《中国电子科学研究院学报》
北大核心
2016年第2期164-168,共5页
Journal of China Academy of Electronics and Information Technology
