Computer Engineering and Applications ›› 2012, Vol. 48 ›› Issue (31): 61-64.

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Image encryption algorithm combining fractional Hartley transform with multiplexing technique

GONG Lihua, DU Juan, FAN Jinghui, ZHOU Nanrun   

  1. Department of Electronic Information Engineering, Nanchang University, Nanchang 330031, China
  • Online:2012-11-01 Published:2012-10-30

结合分数Hartley变换和复用技术的图像加密算法

龚黎华,杜  娟,范静辉,周南润   

  1. 南昌大学 电子信息工程系,南昌 330031

Abstract: The RGB components of a color image are multiplexed through elementary mathematical steps. Subsequently the single-channel multiplexed image is encrypted by the double random phase based on the fractional Hartley transform. The ciphertext of this encryption algorithm is not a color image but a complex matrix. It is shown that the encryption algorithm has a simple encryption process, enough keys to be chosen with large key space and high security.

Key words: image encryption, fractional Hartley transform, multiplexing technique, double random phase

摘要: 通过初等数学运算对彩色图像的RGB三个分量进行复用,并结合基于分数哈特莱变换的双随机相位对其进行单通道加密。加密算法的密文不是一幅彩色图像,而是一复数矩阵。研究表明,该加密算法加密过程简单,密钥选择性大,且有较大的密钥空间和较高的安全性。

关键词: 图像加密, 分数哈特莱变换, 复用技术, 双随机相位