摘要
根据数字水印技术,结合地理数据库中数据的坐标属性和特点,分析了传统数据库水印算法存在的主键依赖和嵌入不均匀等问题,提出了一种不依赖主键的地理数据库水印算法,通过对地理数据进行可嵌位的分离和映射,建立双重定位机制,实现了水印信息的同步,并引入校验方法增强水印算法的鲁棒性。实验结果表明,该算法能够较好地抵抗数据库的常用攻击方式,具有较强的可行性和实用价值。
Based on the technology of digital watermarking,the disadvantages of traditional database watermarking algorithms are analyzed in this paper.Taking the features of geographical data and its coordinates into consideration,a new watermarking algorithm for geographic database that does not depend on primary key is proposed.The algorithm splits embedded bit from geographic data,builds the mapping and positioning mechanism to realize the synchronization of watermark information.In addition,the check method is used to enhance robustness of watermark.Experiment results show that the proposed algorithm has quite good resistance to common database attacks,with a strong feasibility and significance in practical applications.
出处
《地理与地理信息科学》
CSCD
北大核心
2015年第5期86-89,共4页
Geography and Geo-Information Science
基金
国家社科基金重大项目(11&ZD162)
国家自然科学基金项目(41301413)
江苏省青年基金项目(BK20130903)
关键词
地理数据库
数字水印
主键
鲁棒性
geographical database
digital watermarking
primary key
robust
