基于加密置乱的文本图像水印算法  

Text image watermarking based on encryption permutation

作　　者：郭喜平[1] 孙素静[2] 王妍妍[1] 

机构地区：[1]兰州大学信息科学与工程学院,甘肃兰州730000 [2]石家庄铁道学院计算机与信息工程分院,河北石家庄050043

出　　处：《计算机工程与设计》2009年第1期231-234,共4页Computer Engineering and Design

基　　金：科技部基金项目(2001DBI10060)

摘　　要：提出了一种利用加密算法并结合散列函数选择文本中嵌入水印的汉字序列的算法。同时该算法在嵌入的环节采用了冗余嵌入来降低误判率进而提高了水印的抗攻击性。依据此算法,一方面增加了攻击者去除水印的不可预测的难度,提高了水印的安全性;另一方面可以分散冗余水印的分布,抵抗非法使用者的剪裁等的局部性攻击。实验分析结果表明,此算法在提高数字水印安全性和抗攻击性方面非常有效。A text image watermarking algorithm using encryption and hashing function is presented to choose Chinese characters sequence which need to be embedded watermarking. During the process of embedding watermarking, the algorithm imports redundancy to decrease the probability of error estimation and increase the resistibility of malicious attacks. On the one side, the algorithm can considerably improve uncertain difficulty of wiping offwatermarking and watermarking security. On the other side, the algorithm can dispence redundancy watermarking distributing, withstand attacker＇ s clippling locally attack. The experiments demonstrate these effective results.

关 键 词：加密 散列函数 文本 水印 冗余 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]