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 .
出处
《微电子学与计算机》
CSCD
北大核心
2013年第11期35-38,共4页
Microelectronics & Computer
基金
山西省科技攻关项目(20090322004)
关键词
动态图水印
IKPPCT编码
防篡改
数据率
鲁棒性
dynamic graph watermarking
IKPPCT encoding scheme
tamper-proofing
data rate
robustness
