More recent authorization models also permit specification of negative authorizations stating accesses to be denied. This approach raises several problems. In particular, it is impossible for the owner of an object to retain control of the users that can access his objects. Argos - A configurable access control system for interoperable environments . Several factors have limited the incorporation of access control mechanisms in mainstream distributed object systems technology.
Object models are heterogeneous in nature with tremendous semantic diversity.
Authorization and access control in IRO DB is role based. Proc. of the Working Conf. Several factors have limited the incorporation of access control mechanisms in mainstream distributed object technology. Object models are heterogeneous with tremendous semantic diversity. Our work in the area of multipolicy systems seeks a common ground for access control mechanisms that can support the interoperation of disparate authorization policies.