【作者】 朱勤； 骆轶姝； 乐嘉锦；

【Author】 Zhu Qin~(1,2),Luo Yishu~1,and Le Jiajin~1 1(College of Information Science and Technology,Donghua University,Shanghai 200051) 2(College of Computer Science and Technology,Nantong University,Nantong 226019)

【机构】 东华大学信息科学与技术学院； 南通大学计算机科学与技术学院；

【摘要】 外包数据库系统为数据拥有者及数据库用户提供远程的数据存储、更新与查询服务.由于服务器本身非完全可信,外包数据库的版权保护问题日益重要.介绍了外包数据库系统的基本结构;论述了外包数据库版权保护的基本需求与主要技术;提出了基于数字水印技术实现外包数据库版权保护的技术方案.系统在密钥与随机混沌序列的参与下进行水印信号的嵌入,水印检测无需原始数据库参与,以水印匹配率进行版权判定.水印攻击分析及实验结果显示,系统具有较高的鲁棒性与可用性.更多还原

【Abstract】 In outsourced database system,the service provider offers mechanisms of storing,updating and querying database to the owners and clients.Since a service provider is seldom fully trusted,it is important to provide right protection for outsourced database.The basic architecture of outsourced database is introduced in this paper.The requirements and mechanisms of the copyright protection for outsourced database are discussed.Then,a novel scheme of right protection for outsourced database based on digital watermarking is proposed.In the presented system,watermark is embedded into the database under the control of both the secret key and the chaotic random numbers.No original database is needed during watermark detection and the copyright is judged by the match rate of watermark.The analyses of attacks towards watermark and the results of the experiments show that this system possesses high robustness and availability.更多还原