Abstract
Emergence of the mobile computing paradigm helps people to work in a much more convenient and efficient way, anywhere and anytime. Today its application areas such as traffic reports, weather forecast, bill paying and healthcare are so popular. The field of data management is also extended with such new services and applications. A mobile database system is a special heterogonous distributed system that supports mobile computing. One of the most important types of queries in mobile environments is location dependant query. Its answer is dependent to the mobile user's location. However, revealing location information raises privacy concerns. This paper concentrates on query processing in this paradigm.
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