基于分频域相位和幅度的数字图像加密新方法

A New Image Encryption Method Based on Phase and Amplitude of Fractional Domain

伴随着网络技术和多媒体技术的飞速发展,多媒体数据逐渐成为人们获取信息的重要来源,并成为人们生活的重要组成部分。因而,如何保护多媒体信息的安全成为国际上研究的热门课题。文中提出利用混沌序列实现对图像分数傅里叶系数矩阵的加密,为图像加密提供了一个新方案。实践表明,该方法具有密图文件保密性高、密钥简单等特点。

The digital media has become a main way for information communication along with the wide use of network. At the same time, multimedia information security problems including copyrights piracy emerged as side effects of the popularity of digital representation and distribution over network. In this paper, the discrete fractional Fourier transfomn coefficient matrix was transformed by chaotic sequences. It points out a new method of image encryption. The test results show that the new eneryption method will keep the image file in high secrecy and the key is simple.