Vertical Fragmentation Security Study in Distributed Deductive Databases
Aiming to extend relational databases while preserving their declarative programming style, deductive databases support a rule-based language capable of expressing complete applications. Distributed deductive databases have been intensively studied in the past decades mainly because they provide a high level for protecting voluminous data with low costs. In such systems one of the most important processes is the fragmentation of data and rules since it represents a basis for the allocation process. It also needs to be secured all the remote database fragments and the infrastructure. This paper studies the vertical fragmentation for such a system proposing a security method which provides authentication.