Re: [Full-Disclosure] Erasing a hard disk easily
Valdis.Kletnieks_at_vt.edu
Date: 07/14/04
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To: Maarten <fulldisc@ultratux.org> Date: Wed, 14 Jul 2004 00:44:47 -0400
On Mon, 12 Jul 2004 23:23:24 +0200, Maarten <fulldisc@ultratux.org> said:
> * Department-of-defense level (dd as above but lots more times (like 10+))
DOD 5220-22M says:
http://www.irwin.army.mil/ac/Electronic_Publications/DoD_Pubs/DoD%205220-22-M/cp
8.pdf
Pages 14 and 15 note methods "a, b, d, and m" sanitizing fixed drives,
and continues:
d. Overwrite all addressable locations with a character, its complement, then a
random character and verify. THIS
METHOD IS NOT APPROVED FOR SANITIZING MEDIA THAT CONTAINS TOP SECRET INFORMA-
TION.
So 3 passes with verification is sufficient for up to Secret. Top Secret
and higher classifications require physical destruction of the disk.
(Note that these are the regs for civilian-sector contractors to the DoD,
anybody with citations for the military and/or intelligence community
segments feel free to speak up - but I suspect they're fairly similar..)
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