Trusting Your Cloud Provider - Protecting Private Virtual Machines
There are effective measures to protect these data, one of which is encryption. As the user write in CfP 2013: "Uses encryption and access control". Concerning (IaaS) clouds the presenter has data in execution. That is, the virtual image/Virtual Machine (VM) sent to the cloud provider is the secret to be protected. The problem is: this secret must execute on someone else's system.