Wiping Media

Media can be wiped to delete all of the files on the device and make it harder for data to be recovered using specialized tools that can read the remnants of files that were previously on the disk.

Multiple media can be inserted at the wipe option selection screen, in which the wipe selection will be applied to all the media.
The device index will be displayed under each option.
images/download/attachments/35743376/wipe_options.png

There are four options:

  • Format

  • 1 Pass

  • 3 Pass

  • 7 Pass

Format is the fastest option, but it simply removes the references to the files on the drive without overwriting those portions of the drive.
The 1, 3, and 7 pass wipe options write over the entire drive with differing algorithms, making it much more difficult to retrieve the data that was originally stored on the drive.
The United States Department of Defense recommends using a 7 pass wipe to clean media.
OPSWAT does a low-level sector by sector wipe of the media.

Using the wipe feature will completely erase and reformat ALL information on the device.
This includes the partition table and master boot record along with any file system information.

Algorithm Details

Num. of Passes

Algorithm Steps in Order

Security Standard

1

  1. Pseudorandom

  • British HMG Infosec Standard 5, Baseline Standard

  • Australian Government ICT Security Manual 2014 - Controls

3

  1. All 1's

  2. All 0's

  3. Pseudorandom

  • U.S. DoD Unclassified Computer Hard Drive Disposition*

  • U.S. Air Force System Security Instruction 5020**

  • U.S. Navy Staff Office Publication NAVSO P-5239-26

  • British HMG Infosec Standard 5, Enhanced Standard

*We use pseudorandom instead of a fixed pattern as our final pass

**We select 0xFF and 0x00 (reverse of standard), then pseudorandom data instead of a fixed character for our final pass

7

  1. All 1's

  2. All 0's

  3. Pseudorandom

  4. Pseudorandom

  5. Pseudorandom

  6. Pseudorandom

  7. Pseudorandom

  • Bruce Schneier's Algorithm: Applied Cryptography, ISBN 0-471-12845-7

Wiping will occur among each media one-by-one with the final results displayed at the end.
images/download/attachments/35743376/wipe_progress.png images/download/attachments/35743376/wipe_results.png