DoD 5220'22M

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DoD 5220.22-M

• Presented by
• Pallavi Kosaraju

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DoD 5220.22-M

• The 5220.22-M specification advocates writing
  every sector on the disk several times with
  nonrandom and pseudorandom data.
• Any wipe routine that implements the U.S. DOD
  specifications defined in the DOD 5220.22-M
  standard is called U.S. DOD-compliant.

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DoD 5220.22-M

• US Department of Defense in the clearing and
  sanitizing standard DoD 5220.22-M recommends the
  approach "Overwrite all addressable locations
  with a character, its complement, then a random
  character and verify" for clearing and
  sanitizing information on a writable media.

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US Department of Defense 5220.22-M Clearing and
Sanitization Matrix
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US DoD 5220.22-M Clearing and Sanitization Matrix
contd
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US DoD 5220.22-M Clearing and Sanitization Matrix
contd
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US DoD 5220.22-M Clearing and Sanitization Matrix
contd
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US DoD 5220.22-M Clearing and Sanitization Matrix
contd
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US DoD 5220.22-M Clearing and Sanitization Matrix
contd
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Conclusion

• The Department of Defense (DOD 5220.22-M)
  recommends three overwrites with different
  patterns for adequate security.
• The NSA requires 7 passes. Some Internet sites
  recommend 30 or more passes.
• Some Internet sites recommend 30 or more passes.
• Peter Gutmann method is more secure than DoD
  5220.22-M standard. But, takes time to perform.

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Questions?