There are two key features missing from Virtualization and Cloud Computing. Those are auditing and forensics. The A6 project aims to fix this problem for auditing, but there is only some research into forensics. The issue is about discovering who did what when, where, how, and hopefully why. Auditing plays into this for Compliancy but also for forensics. Forensics has two major components in its arsenal: Audit Trails, and Disk Images.