关键词: 超混沌序列 伪随机序列 非线性离散化 数字图像 图像加密

Abstract:

The paper gives an algorithm for generating extended chaotic sequences, and the extended chaotic sequences are applied to digital image encryption- The algorithm is based on the n-order rational Bezier curve, and the generated se- quences feature good randomization. With a nonlinear discretization of  the sequences, we can get the relevant integer pseudorandom sequences. The experimental results indicate the algorithm has good encryption effect iypting and deerypting digital images.

Key words: hyperchaotic sequence, pseudo-random sequence, nonlinear dispersion, digital image, image encrypt ion