基于Shear变换的彩色地形图混沌加密算法  

Chaotic encryption algorithm for color topographic maps based on Shear transform

作　　者：林琳[1] 王玲芝[2] 

机构地区：[1]陕西职业技术学院计算机科学系,陕西西安710100 [2]西安邮电大学自动化学院,陕西西安710121

出　　处：《现代电子技术》2014年第14期120-124,共5页Modern Electronics Technique

基　　金：中央高校基本科研业务费项目(K50513100006)

摘　　要：针对目前研究地形图图像加密算法较少,以及现有图像加密算法易被破解的问题,提出基于Shear变换的彩色地形图混沌加密算法。该算法充分利用了Shear变换的多方向性,能够很好地对地形图的线划要素信息进行置乱的特点,以及Lorenz混沌系统具有极强初值敏感性和更大的密匙空间和安全性的特点。通过对彩色地形图的加密和解密实验,以及抗攻击性能对比实验,表明使用该算法加密后的彩色地形图具有更高的安全性,并且载体图像具有较高的抗攻击性能。A chaotic encryption algorithm for color topographic maps,which is based on the shear transform,is proposed to solve the problems that image encryption algorithms for topographic maps is less studied and the existing image encryption algorithm is easy to decode. This algorithm makes full use of the multi-direction features of Shear transform,the characteristic of effectively scrambling the feature information of lines in topographic maps,and the characteristics that the Lorenz chaotic system is extremely sensitive to the initial value,has larger key space and security. The encryption and decryption experiments for color topographic maps indicate that the proposed algorithm has higher security and strong resistance to various attacks.

关 键 词：Shear变换 彩色地形图 ARNOLD变换 LORENZ混沌系统 置乱 加密 解密 

分 类 号：TN918-34[电子电信—通信与信息系统] TP319.41[电子电信—信息与通信工程]