Sunday, September 10, 2006

Zero Fill Sure Delete Sensitive Data

Simply delete a file or format a hard disk by conventional way doesn't securely protect sensitive data stored inside the hard disk!

There are chances that other people able to recover or undelete the sensitive data by using simple undelete utilities such as Restoration.

However, there are utilities too that able to anti-undelete data deleted from hard disk! Anti-undelete utilities such as SDelete and Sure Delete will overwrite the sensitive data at least one time (or more than one times for more security in mind) with arbitrary bits or zero bits as Zero Fill does!

SDelete is a command line utility which is easy to use yet secure than Windows built-in del DOS command or Windows native delete function! To make it easy to use,

  1. Click on Start button,
  2. Click on Run menu,
  3. Type cmd in the Open field and click OK to call up Command Prompt window,
  4. Type echo %PATH% at the command prompt and press ENTER to output a list of default program paths separated with semi-colon.
    The default program path is used by Windows Run menu and Command Prompt to automatically locate a file or program. For example, the Run menu automatically locate cmd.exe and execute it, after typing cmd followed by pressing ENTER in previous step shown. If the cmd.exe is not reside in default program path, the Run menu will not able locate and execute it automatically.
  5. Put the Sdelete.exe to the any one of the folder path listed in echo %PATH% output, preferable is to use the system folder (e.g. C:\Windows\System32 in a default Windows XP setup),
  6. Add a MS-DOS Command Prompt shortcut with customized option switch to Context Menu (if the shortcut is not there).

    After this step, using command line utilities will becomes easier. Just right-click on any folder and click on the MS-DOS Command Prompt shortcut added to Context Menu, the MS-DOS Command Prompt will opens and automatically pointing to the complete folder path of which the folder being right-clicked. Now what? Just type sdelete SensitiveFile.dat to delete a file called SensitiveFile.dat resides in that particular folder - hassle free!
Related information:
  • SDelete command line utility used to delete sensitive data securely
  • Sure Delete Window GUI utility used to delete sensitive data securely
  • Create File is one of Windows 2000 Resource kit (creatfil.exe) used to generate empty file of arbitrary size up to 4GB (when running on Windows XP). Use it to create as many empty file as possible to fill up all the empty space reported by Windows will able to wipe off deleted file data that reside at these free disk space.
  • WipeFree command line utility used to generate dump file to fill up free disk space where the deleted file reside. It is better than creatfil.exe as it doesn't limited to 4GB file size. Although, its speed is lower than creatfil.exe does.
  • What happen to a file when deleted from Windows
  • Undelete files from an emptied Recycled Bin with Restoration
  • Enable MS-DOS faster change path and auto-complete filename
  • Search more related info with Google Search engine built-in

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