Istituto di Informatica e Telematica     
Mori P., Martinelli F., Lazouski A., Jensen J., Johnson I., Kershaw P., Coppola M., Dazzi P. The CONTRAIL Approach to Cloud Federation. In: International Symposium on Grids and Clouds (ISGC 2012) (Taipei, 2012). Proceedings, pp. 1 - 14. Proceedings of Science, 2012.
The CONTRAIL project proposes a framework for Cloud Federations, that provides users with a single point of access to Cloud resources and relieves them from managing the credentials for access to individual Cloud service providers. The Federation services dynamically broker access to Cloud resources, ensures that the best available resource is selected, and that diverse resources are accessed consistently. This paper presents the CONTRAIL approach to federated identity management, focusing on authentication and authorization. In particular, we present ``usage control'' extensions to standard authorization frameworks to dynamically address changes in authorization decisions.
Subject contrail
Cloud Federations
K.6.5 Security and protection

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