Multiple authorization: a model and architecture for increased, practical security

Security of systems and management infrastructure is crucial for a successful, reliable and safe use. Most currently deployed systems are based on simple subject/object-relations where control of access happens. This has the drawback that any access decision occurs just on the behalf of the single subject accessing. In this paper we describe an extended access control model that allows us to include authorization of multiple subjects thus overcoming this drawback while still focusing on practical aspects of simple integration in many of the existing systems.