A Conflict Detection Mechanism for Authorization Using Intention Types in Object-Oriented

摘要

Many object-oriented database systems have used the notion of implicit authorization to avoid the overhead caused by explicitly storing all authorizations for each object. In implicit authorization, it is very important to detect efficiently conflicts between existing authorizations and new authorizations to be added. In this article we propose a conflict detection mech- anism in the OODBMSs using implicit authorization with the notion of intention type authorization. When we grant an autho- rization on a node n in the database granularity hierarchy, the existing method is inefficient in determining the conflicts since it needs to examine all authorizations on the descendants of the node n.