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The decentralization of corporate policy administration aiming to maintain the unified management of user permissions is a hard task. The heterogeneity and complexity of corporate environments burdens the security administrator with writing equally complex policies. This paper proposes an architecture based on Web Services, policy provisioning, and authorization certificates, to build up a loosely coupled unified administrative control for corporate environments. A certificate-based permissiondoi:10.1109/inm.2009.5188786 dblp:conf/im/MarconSLOS09 fatcat:ki6g65ne2bg6jkzhqrevmvfv54