一种新的高维混沌在图像加密中的应用

Application of a new high-dimensional chaos in image encryption

本文提出了一个基于三维Lorenz混沌系统改进的新四维超混沌系统,并基于该超混沌系统构建了一种新的的图像加密方案,解决了明文图像扩散性不足的问题。利用自定义的函数通过明文图像来生成超混沌系统的初始条件,然后将明文图像的一部分嵌入到密文图像中,从而进一步破坏了图像的相关性。结果表明,对于输入的明文图像的单一像素值变化将导致加密图像中产生雪崩效应,具有较好的加密性能。

In this paper,a new 4-D hyperchaotic system based on the 3-D Lorenz chaotic system is proposed.A new image encryption scheme is proposed based on the hyperchaotic system to solve the problem of insufficient image diffusion. The initial conditions of the hyperchaotic system are generated from the plaintext image using a custom function,and then a part of the plaintext image is embedded into the ciphertext image,further destroying the image correlation.The results show that a single pixel value change of the input plaintext image will lead to an avalanche effect in the encrypted image,which has better encryption performance.