Digital Watermark-based Security Technology for Geo-spatial Graphics Data

1 Introduction Geo-spatial graphics data, as fundamental data in build- ing the Digital Earth, their security poses a big problem and draw much attention of many researchers all over the world. Digital Watermarking, which is based on theories of steganography, is a novel technique for data security developed in the recent years. A digital watermark is defined as an identifiable digital signal or mode that is permanently embedded into other data, namely host data, while it does not affect the …

Digital watermark-based security technology for geo-spatial graphics data

The paper presents a set of techniques of digital watermarking by which copyright and user rights messages are hidden into geo-spatial graphics data, as well as techniques of compressing and encrypting the watermarked geo-spatial graphics data. The technology aims at tracing and resisting the illegal distribution and duplication of the geo-spatial graphics data product, so as to effectively protect the data producer’s rights as well as to facilitate the secure sharing of geo-spatial graphics data. So far in the GIS field throughout the world, few researches have been made on digital watermarking. The research is a novel exploration both in the field of security management of geo-spatial graphics data and in the applications of digital watermarking technique. An application software employing the proposed technology has been developed. A number of experimental tests on the 1:500,000 digital bathymetric chart of the South China Sea and 1:10,000 digital topographic map of Jiangsu Province have been conducted to verify the feasibility of the proposed technology. Foundation item: Under the auspices of Jiangsu Provincial Science and Technology Fundation of Surveying and Mapping (No. 200416) Biography: JIA Peihong (1972–), female, a native of Zhongwei of Ningxia Hui Autonomous Region, engineer, Ph.D. candidate, specialized in marine GIS theory and application.