基于Logistic混沌映射的比特级数字图像加密算法研究
Research on Bit-Level Digital Image Encryption Algorithm Based on Logistic Chaotic System

作者: 黄晶晶 * , 王清华 , 李振华 :南京理工大学,江苏 南京;

关键词: 混沌置乱图像加密Chaos Scrambling Image Encryption

摘要:
提出一种基于Logistic混沌映射的比特级数字图像加密方法。灰度图像的每个像素值采用八位的二进制数来表示,将二维灰度图转换为一维的0和1的数码串来处理。根据给定的初始值由Logistic映射及生成混沌序列,对混沌序列进行排序,得到位置索引,根据位置索引对原始图像进行比特级的置乱操作,可以达到集像素融合和像素置乱于一体的图像加密结果。实验表明,该算法简单易行,安全高效。

Abstract: A bit-level digital image encryption method based on Logistic chaotic system is proposed. Each pixel value of a grayscale image uses eight-bit binary numbers, and the two-dimensional gray image is converted to a one-dimensional string containing 0 and 1. We generate the Logistic chaotic sequence with the given initial value, and then sort the chaotic sequence to obtain a location index. According to the location index, the original image is scrambled in bit-level. The pixels fusion and pixel scrambling encryption of an image are realized simultaneously. Experiments show that the algorithm is simple, safe and efficient.

文章引用: 黄晶晶 , 王清华 , 李振华 (2016) 基于Logistic混沌映射的比特级数字图像加密算法研究。 图像与信号处理, 5, 88-94. doi: 10.12677/JISP.2016.53012

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