An improved bit shuffling pixels-based image scrambling method  

作　　者：赵洪 王宏霞 王锦 

机构地区：[1]Laboratory of Information Security and National Computing Grid,Southwest Jiaotong University

出　　处：《Optoelectronics Letters》2011年第1期74-76,共3页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.60702025);the Research Fund for the Doctoral Program of Higher Education (No.20070613024);the Sichuan Youth Science & Technology Foundation of China (No.07ZQ026-004)

摘　　要：Compared with the Arnold transform,the image scrambling method based on bit shuffling pixels is much more secure,and has higher efficiency and speed.However,the key space of this bit shuffling pixels based method is too small to resist exhaustive search attack.Therefore,an improved method based on chaos is proposed in this paper.The security of the improved scheme is enhanced by increasing the number of the keys.Theoretical analysis and experimental results show that the proposed method is effective and has higher security.Compared with the Arnold transform,the image scrambling method based on bit shuffling pixels is much more secure,and has higher efficiency and speed.However,the key space of this bit shuffling pixels based method is too small to resist exhaustive search attack.Therefore,an improved method based on chaos is proposed in this paper.The security of the improved scheme is enhanced by increasing the number of the keys.Theoretical analysis and experimental results show that the proposed method is effective and has higher security.

关 键 词：图像置乱 像素 洗牌 进位 安全性 穷举攻击 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]