面向网络环境的地理空间数据数字水印模型

摘要

This paper built a digital watermarking model for geospatial data oriented network environment ,in the view of security of geospatial data distribution and using in the network environment ,based on digital watermark-ing technology ,combining with data encryption thinking ,taking into account the characteristics of geospatial data in network environment .Based on this model , considering the diversity source of geographic data in network environment ,we establish a watermark algorithm library and embed digital watermark in geographic data itself .at the same time ,propose a packet-based digital watermarking algorithm ,which embedded watermark information through the mapping function quantifily in the network transmission packet . Experiments show that the digital watermark model oriented the network environment get a better solution for the use of geospatial data access control ,copyright protection ,tracking management and so on in network environment .%从网络环境下地理空间数据分发、使用的安全性角度出发，结合数据加密思想，顾及网络环境中地理空间数据特性，构建了一种面向网络环境的地理空间数据数字水印模型。在此模型基础上，考虑到网络环境中地理数据来源的多样性，建立了水印算法库，对地理数据本身进行数字水印的嵌入。同时，提出一种基于数据包的数字水印算法，算法将水印信息通过映射函数以量化方式嵌入网络传输中的数据包中。试验表明，作为一种面向网络环境的数字水印模型，较好地解决了网络环境下地理空间数据的使用权限控制、版权保护、跟踪管理等问题。