Geo-WDBMS: an improved DBMS with the function of watermarking geographical data

Authors:
Min Huang;Xiang Zhou;Jiaheng Cao;Zhiyong Peng
Affiliations:
Computer School, Wuhan University, wuhan, China;State Key Lab of Software Engineering, Wuhan University, wuhan, China;Computer School, Wuhan University, wuhan, China;Computer School, Wuhan University, wuhan, China and State Key Lab of Software Engineering, Wuhan University, wuhan, China
Venue:
DASFAA'07 Proceedings of the 12th international conference on Database systems for advanced applications
Year:
2007

Citing 4
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Abstract

This paper focuses on the issue of geographical data's copyrights protection. A Geo-WDBMS has been built by embedding the watermarking functions into the inner code of the open source DBMS PostgreSQL. And its core watermarking mechanism is to insert and detect mark bits in the coordinates of the vertices in geographical objects using the methods of classifying and twice majority-voting. Further more, error correcting mechanism is used to enhance the resilience of the system and blind watermark is realized. Experiments on watermarking digital maps showed that the marked maps are inconspicuous and robust to various attacks.