US Patent 9699150 System and method for secure cloud computing

In a method for secure cloud computing, a virtual machine (VM) associated with a client is executed at a computer within a trusted computing cloud. An image including state information of the VM is obtained; storage of the image is arranged; a freshness hash of the image is determined; and the freshness hash is sent to the client. Subsequently, at the same computer or at a different computer within the trusted computing cloud, the stored image may be retrieved; a freshness hash of the retrieved image may be determined; the freshness hash of the retrieved image may be sent to the client; and an indication may be received from the client verifying the integrity of the freshness hash of the stored image.