Backup for Workgroups is an unpretentious name for what turns out to be an uncomplicated product. Not much about this product is very clever, but that works to its advantage. Its lack of sophistication makes it a must-have for the workgroups it mentions, and for many more small business networks who might miss the point.
Every attack on a computer system leaves a trace behind, no matter what an attacker might to to cover their steps. Also, data can be hidden by an attacker to use later as a back door. Forensics in part looks at uncovering evidence of this activity.