基于改进的KPPCT编码的防篡改动态图水印方案  

A Tamper-proofing Dynamic Graph Watermarking Scheme Based on Improved KPPCT Encoding

作　　者：陈艳琳[1] 杨秋翔[1] 陈够喜[1] 

机构地区：[1]中北大学电子与计算机科学技术学院,山西太原030051

出　　处：《微电子学与计算机》2013年第11期35-38,共4页Microelectronics & Computer

基　　金：山西省科技攻关项目(20090322004)

摘　　要：针对动态图水印中的KPPCT编码的数据率低和鲁棒性差的问题,提出了一种改进的KPPCT(Improved Radix-k Planted Plane Cubic Tree,IKPPCT)编码方案.该方案利用二叉树左右分支的唯一性进行系数编码,扩大了水印值的表示范围;并且引入了防篡改的思想,用以验证水印结构是否被破坏,加强了保护的功能.理论分析和实验结果表明,该改进方案提高了数据率和鲁棒性,是一个较好的方案.This paper proposed a improved KPPCT （IKPPCT ,Improved Radix-k Planted Plane Cubic Tree） encoding scheme towards the problem of the lower data rate and the weak robustness of KPPCT encoding in dynamic graph watermarking .This scheme took advantage of uniqueness of binary tree＇s left-right branches to encode coefficient and expanded the range of watermarking value . And also it strengthened the ability to protect software by introducing the tamper-proofing to verify whether the watermarking structure was destroyed .Theoretical analysis and experimental results show that this scheme has high data rate and robustness ,and is a better scheme .

关 键 词：动态图水印 IKPPCT编码 防篡改 数据率 鲁棒性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]