CYBERNAUT: A Cloud-Oriented Energy-Efficient Intrusion-Tolerant Hypervisor

An apparatus comprising: a virtual machine (VM) base image database; a VM image generator configured to build in the VM base image database a corpus of possible VMs that may run on a cloud service provider; an energy profiler configured to generate energy profiles offline of each permutation in the VM base image database under several different operating conditions; an energy profile database populated with the energy profiles generated by the energy profiler; and a monitor configured to monitor energy patterns in side-channels at the VM level and to compare the energy patterns for each VM operating on the cloud service provider with the energy profiles stored in the energy profile database, and further configured to trigger a self-cleansing cycle when a given real-time energy pattern deviates from its corresponding energy profile by a predetermined threshold amount.