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Wiping Standards

By utilizing different wiping standards, secure deletion tools allow you to completely wipe hard disk space by overwriting data according to the selected wiping standard, thus rendering it completely unrecoverable even for the most sophisticated recovery software.

Some secure deletion tools not only allow to select from the standard method of deletion, but provide additional options for creating whiping schemes that meet your specific requirements.

How wiping standards work

- British HMG IS5 (Baseline) (1 pass)
Your data is overwritten with zeroes with verification.

- Russian GOST P50739-95 (2 passes)
GOST P50739-95 wipe standard calls for a single pass of zeroes followed by a single pass of random byte.

- British HMG IS5 (Enhanced) (3 passes)
British HMG IS5 (Enhanced) is a three pass overwriting algorithm: first pass - with zeroes, second pass - with ones and the last pass with random bytes (last pass is verified).

- US Army AR380-19 (3 passes)
AR380-19 is a data wipe standard specified and published by the U.S. Army. AR380-19 is a three pass overwriting algorithm: first pass - with random bytes, second and third passes with certain bytes and with its compliment (with last pass verification).

- US Department of Defense DoD 5220.22-M (3 passes)
DoD 5220.22-M is a three pass overwriting wipe algorithm: first pass - with zeroes, second pass - with ones and the last pass with random bytes. With all passes verification.

- the US Department of Defense DoD 5220.22-M (E) (3 passes)
DoD 5220.22-M (E) is a three pass overwriting wipe algorithm: first pass - with certain bytes, second pass - with its complement and the last pass - with random bytes.

- NAVSO P-5239-26 (RLL)
NAVSO P-5239-26 (RLL) is a three pass overwriting wipe algorithm with last pass verification.

- NAVSO P-5239-26 (MFM)
NAVSO P-5239-26 (MFM) is a three pass overwriting wipe algorithm with last pass verification.

- the US Department of Defense DoD 5220.22-M(ECE) (7 passes)
DoD 5220.22-M(ECE) is a seven pass overwriting wipe standard: first and second passes - with certain bytes and with its compliment, then two passes with random character, then two passes with character and its complement and the last pass - with random character.

- Canadian RCMP TSSIT OPS-II (7 passes)
RCMP TSSIT OPS-II is a seven pass overwriting wipe standard with three alternating patterns of zeroes and ones and the last pass - with random character (with last pass verification).

- German VSITR (7 passes)
The German wipe standard calls for each sector to be overwritten with three alternating patterns of zeroes and ones and in the last pass with character.

- Bruce Schneier (7 passes)
The Bruce Schneier wiping standard has seven passes: first pass - with ones, the second pass - with zeroes and then five times with random characters.

- Peter Gutmann (35 passes)
Peter Gutmann wiping algorithms has 35 passes.

Monday, September 25, 2017 
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