File shredding, which is also referred to as file wiping or as wipe disk, is a process that involves securely deleting a computer file. Through file shredding, the information that was saved on the file cannot be retrieved by any means.
On The Use Of A File Shredder
The term file shredder can now refer to a software utility designed to allow the secure deletion of files from a hard disk. This is in contrast with the delete command available in all operating systems, which actually leaves the contents of the deleted file on the disk. What seems, on the surface, like a permanent enough deletion actually leaves enough on the disk for the deleted file to be reconstructed and the date therein recovered.