基于混沌系统的图像联合压缩加密算法.pdfVIP

计算机仿真 2015 年06 月 第32 卷第06 期 文章编号:1 创)6 -9348 (2015) 06 -0182-06 基于混沌系统的图像联合压缩加密算法 陈益刚，邓家先，谢凯明 ( 海南大学信息科学技术学院，海南海口 570228 ) 摘要:研究图像联合压缩加密，为解决传统压缩细密不同步及低维混沌系统必威体育官网网址性不高等缺点，提出一种基于三维混沌系 统的联合压缩加密算法。 采用三维l。陀m混沌系统生成随机序列，并对序列进行随机性处理.生成储机性更强的二i差稠密 钥，使用密钥在内嵌零树1)、波编码( Ernbedded Zerotree Wavelet. EZW) 的比特平面编词和算术编码之间对阁像压缩产生的上 下文和判决进行修正，实现图像压缩加密同步。 经仿真分析，处理后的随机密钥敏感性商、空间大，使则该密钥对图像数掘 进行加密，具有相对于原始算法相当的压缩效率，能够抵抗多种攻击，具有较高的安全性和必威体育官网网址性。 关键词:联合压缩加密;混沌系统;密钥:算术加密z 安全 中图分类号:1四91. 9 立民标识码:B Image Joiot Compressioo Eocryptioo Algorithm B凶ed 00 Chaotic System CHEN Yi - gang , DENG Jia - xian , XIE Kai - ming (CoUege of Infonnalion Science and Technology Hainan University , Haikou Hainan 570228 , China) ABSTRACf:Rωearch on image jo int ∞mpr民sion encryption. In order to solve the Iraditional oul - o( - step ∞m­ presslOn encηplion and confidenliality of low - dimensional chaotic system fauIts , a kind of image joi nl compres- sionencryption a1gorithm based on the three - dimensional chaotic system is proposed , which uses three - dimensional Lorenz chaos system to produce random s呵uences which is pr咽essed. 四at is a binary random key where is used to modify context and judgment which is between the bit plane coding and arithmetic coding in Embedded Zero tree Wavelet coding( EZW) , make comprωsion， and encryption to synchronize. Experimental results show that the random key sensitivity after processing is high , the large space. Use this key 10 encrypt image dala , which is a relalive to the original quite the compression efficiency o( algorithm , can resi st various attacks , has high security