Date Added: Oct 2012
The authors address the problem of guaranteeing security, with additional consideration on reliability and availability issues, in the management of resources in Cloud environments. They investigate and formulate different requirements that users or service providers may wish to specify. Their framework allows providers to impose restrictions on the allocations to be made to their hosts and users to express constraints on the placement of their Virtual Machines (VMs). User's placement constraints may impose restrictions in performing allocation to specific locations, within certain boundaries, or depending on some conditions (e.g., requiring a VM to be allocated to a different host wrt other VMs).