%0 Conference Proceedings %T Enforcing Subscription-Based Authorization Policies in Cloud Scenarios %+ Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB) %+ George Mason University [Fairfax] %A Capitani Di Vimercati, Sabrina, De %A Foresti, Sara %A Jajodia, Sushil %A Livraga, Giovanni %Z Part 9: Cloud Computing %< avec comité de lecture %( Lecture Notes in Computer Science %B 26th Conference on Data and Applications Security and Privacy (DBSec) %C Paris, France %Y Nora Cuppens-Boulahia %Y Frédéric Cuppens %Y Joaquin Garcia-Alfaro %I Springer %3 Data and Applications Security and Privacy XXVI %V LNCS-7371 %P 314-329 %8 2012-07-11 %D 2012 %R 10.1007/978-3-642-31540-4_24 %K access control %K subscription-based policies %K data outsourcing %Z Computer Science [cs]Conference papers %X The rapid advances in the Information and Communication Technologies have brought to the development of on-demand high quality applications and services allowing users to easily access resources anywhere anytime. Users can pay for a service and access the resources made available during their subscriptions until the subscribed periods expire. Users are then forced to download such resources if they want to access them also after the subscribed periods. To avoid this burden to the users, we propose the adoption of a subscription-based access control policy that combines a flexible key derivation structure with selective encryption. The publication of new resources as well as the management of subscriptions are accommodated by adapting the key derivation structure in a transparent way for the users. %G English %Z TC 11 %Z WG 11.3 %2 https://inria.hal.science/hal-01534756/document %2 https://inria.hal.science/hal-01534756/file/978-3-642-31540-4_24_Chapter.pdf %L hal-01534756 %U https://inria.hal.science/hal-01534756 %~ IFIP-LNCS %~ IFIP %~ IFIP-TC %~ IFIP-WG %~ IFIP-TC11 %~ IFIP-WG11-3 %~ IFIP-DBSEC %~ IFIP-LNCS-7371