Secure query processing in distributed database management systems-design and performance studies

Distributed systems are vital for the efficient processing required in military applications. For these applications it is especially important that the distributed database management systems (DDBMS) should operate in a secure manner. For example, the DDBMS should allow users, who are cleared to different levels, access to the database consisting of data at a variety of sensitivity levels without compromising security. The authors focus on secure query processing in a DDBMS. Implementation of secure query processing algorithms in a DDBMS as well as an analysis of the performance of the algorithms is described