You probably know that when you delete a file, you're not really removing the information from your storage device. Instead, you're designating the space taken up by the file as available for storing new data, should it be needed.
A properly motivated person can recover the deleted information. In fact, data recovery tools such as the free Recuva exist for this very purpose. To keep prying eyes from perusing your deleted data, you need to write over the digital bits that comprise the file. That's where secure-erase utilities come in.
(By the way, the process of recovering … Read more