This program is intended to be used in conjunction with SecureDelete to securely remove any data that might be left behind on your disk in its "unused" sectors (ie. sectors that are not used by existing files).
This is to guard against the possibility that someone with a disk editor might view your unused sectors and recover the contents of files that were previously there (but have since been deleted insecurely).
It does this by opening a file whose name you choose (the name isn't important), and then writes to it continuously until the disk fills up. It then writes another six passes of data (first pass, all one bits, other passes random data), to make sure the data can't be recovered. It then deletes this file, to free up the disk space again.
Before running this program:
On the command line, specify the name of the file you want created. It will default to \UNUSED.DAT
This program does not pretend to solve all of your security problems on your PC. You are recommended to read some of the very good books on computer security and encryption to further your understanding of those issues.
To download, click on the "downloads" button at the top of this page.
This program is supplied free of charge. It is copyright 1998 by Nick Gammon. Source code is available from the downloads area.
Comments to Gammon Software support
Page updated on Wednesday, 15 December 2004