面向矢量地图数据的多级数字水印算法

Multilevel Digital Watermarking Algorithm for Vector Map Data

水印技术作为一项新兴的信息安全技术,在保护矢量地图数据安全中能够发挥重要作用。本文通过分析矢量地图数据特点,研究矢量地图数据数字水印技术特性、常见攻击方式,提出了一种新的多级水印嵌入和检测的算法,嵌入水印时,利用经纬网对矢量地图数据进行划分,综合使用分块嵌入和叠加嵌入的方式,有效提高了水印嵌入级数;检测时,利用相关性原理检测水印信息。实验证明该算法有效可行。

As an emerging information security technology,watermark technology can play an important role in protecting vector map data security.In this paper,by analyzing the characteristics of vector map data,studying the characteristics of vector map data digital watermarking and common attack methods,a new multi-level watermark embedding and detection algorithm is proposed.When embedding the watermark,the latitude and longitude network is used to divide the vector map data.The integrated use of block embedding and superimposed embedding effectively improves the watermark embedding level;when detecting,the watermark information is detected using the correlation principle.Experiments prove that the algorithm is effective and feasible.