基于混沌序列的CCSDS图像压缩算法安全性扩展  

Security Expansion to CCSDS Image Compression Algorithm Based on Chaotic Sequence

作　　者：邵伟力[1,2] 孙奎远[1,2] 赵学志[1,2] 

机构地区：[1]中国人民解放军北京军区 [2]内蒙古军区兴安军分区,内蒙古乌兰浩特137400

出　　处：《现代电子技术》2011年第8期121-123,共3页Modern Electronics Technique

摘　　要：CCSDS是由空间数据系统咨询委员会提出的,故针对空间飞行器应用的图像压缩算法,面向空间敏感图像传输的安全性需求,以及针对CCSDS图像压缩算法的特点,在不改变CCSDS算法流程和数据格式的基础上,利用混沌序列的随机性和不可预测性,在小波变换域对图像进行加密处理,以达到安全性扩展的目的。实验结果表明,该算法实现了较高的加密强度,同时保持了CCSDS算法高压缩比和低复杂度的优势,具有与CCSDS兼容性好,实现简单的优点。CCSDS image compression is an algorithm targeting at the applications of spacecraft image procession,initiated by Consultative Committee for Space Data System.In this paper,a scheme that integrates image encryption into the original algorithm is proposed to fulfill the demands of data security in space-based critical image data transmission.The scheme based on specific features of CCSDS image compression embeds encryption in wavelet transformation domain while not changing the original processing flow and data format.The advantages of the random and unpredictability of chaotic sequence are adopted in the encryption processing.Test results show that the proposed scheme can implement a highly reliable encryption and preserve those excellent features of CCSDS,such as high compression ratio and low complexity.The scheme is highly compatible with CCSDS standard,and simple for implementation.

关 键 词：图像加密 混沌加密 图像压缩 CCSDS 小波变换 LOGISTIC映射 

分 类 号：TP919-34[自动化与计算机技术]