The proposed approach provides a resilient UCONABC reevaluation authorization model for cloud computing. The usage architecture for collecting contextual data allows for fine-grained services accounting and authorization attributes. The data are consolidated on a management domain and provided to consumer management systems, enabling the reconfiguration of usage policies and monitoring of SLA fulfillment. The management services are provided through a federated environment (FE) hosted on a cloud computing provider. The federation environment is a usage control management domain shared by the policies evaluation system, accounting attributes handling system, SLA manager and service’s broker. The service’s broker offers an entry point for cloud users and an FE entry point for providers and consumers. The experiments made with a proof-of-concept prototype show a set of measurements for an application scenario (e-commerce) and allows for the identification of exception conditions in the authorization reevaluation.
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