Abstract
The environment changes in the Internet and network technology have enabled real-time services of higher-quality and larger-size content. The convenience of digital content has increased the demands on content, but because of the nature of digital content that can be duplicated unlimitedly, the issues on security and copyright have come to the fore. In the meanwhile, new technologies to control access to the digital content based on usages and permissions for identical digital content are emerged. This paper proposes multi-level access control using Delta compress algorithm and by granting access control based on usages and permissions of content, it prevents the illegal use of GIS data and protects and maintains digital content consistently.
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