Modern distributed systems contain a large number of objects and must be capable of
evolving, without shutting down the complete system, to cater for changing requirements …

Policies are a means of influencing management behaviour within a distributed system,
without coding the behaviour into the managers. Authorisation policies specify what …

3 IT-Security Page 1 3 IT-Security 3.1. Definition IT (Information Technology) Security
mechanisms are needed to protect personal data and thus IT Security is often regarded as the …

Roles have been widely used for modeling theauthority, responsibility, functions, and
interactions, associated with manager positions within organizations. In this paper, we …

It is not sufficient to merely check the syntax of new policies before they are deployed in a
system; policies need to be analyzed for their interactions with each other and with their …

The need for access control in a hierarchy arises in several different contexts. One such
context is managing the information of an organization where the users are divided into …

Distributed systems management faces new challenges due to an exponential increase in
the size of networked environments. New paradigms that devolve management control and …

The integration of object-oriented programming concepts with databases is one of the most
significant advances in the evolution of database systems. Many aspects of such a …

The integration of autonomous information systems causes a fundamental problem for
security management. How to ensure a consistent authorisation state if several independent …

Object-oriented databases are a recent and important development and many studies of
them have been performed. These consider aspects such as data modeling, query …