Date Added: Jul 2009
Securing Virtual Machines (VM) is a major concern in virtualizing commodity Operating Systems (OS). Virtual Machine Monitors (VMM) like Xen require a full-blown privileged OS, VM0 to manage guest VMs. Therefore VM0 becomes the single point of failure. For example, a malicious administrator may suspend a VM and read sensitive information by dumping VM memory. Overall, lack of hardware support for memory and I/O virtualization has resulted in an insecure and relatively slow memory and I/O virtualization architectures.