Full Disclosure mailing list archives
Re: Stealthier Internet access
From: Valdis.Kletnieks () vt edu
Date: Tue, 25 May 2010 18:01:17 -0400
On Wed, 26 May 2010 03:01:26 +0545, Bipin Gautam said:
@Valdis: Those were from some ooold notes, (~4yrs) :) if you have full hdd encryption wiping hdd header and backup header few (7?) times and rest hdd with 1 random pass should be enough.
My point is that even if the drive *wasn't* encrypted, a single-pass overwrite is sufficient to render it unrecoverable.
Wiping Magnetic storage is tricky on its own.
It's actually not that hard, as long as you actually know how many gauss you *really* need to wipe a device (inside surface, near axis, of multi-platter devices is a particular gotcha). It's not worth worrying about wiping the remapped sectors on a disk - even an older 40G drive has some 80 million sectors on it - so even if you have a few hundred sectors that have remapped due to I/O errors, it's still literally a one-in-a-million shot that anything incriminating is in the sector. Plus it's a *bad* sector, so reading and recovering the data is a bitch...
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Current thread:
- Stealthier Internet access Bipin Gautam (May 25)
- Re: Stealthier Internet access Valdis . Kletnieks (May 25)
- Re: Stealthier Internet access Christian Sciberras (May 25)
- Re: Stealthier Internet access Christian Sciberras (May 25)
- Re: Stealthier Internet access Bipin Gautam (May 25)
- Re: Stealthier Internet access Valdis . Kletnieks (May 25)
- Re: Stealthier Internet access BMF (May 25)
- Re: Stealthier Internet access Marsh Ray (May 25)
- Re: Stealthier Internet access Bipin Gautam (May 25)
- Re: Stealthier Internet access Valdis . Kletnieks (May 25)
- Re: Stealthier Internet access T Biehn (May 31)
- Re: Stealthier Internet access Christian Sciberras (May 25)
- Re: Stealthier Internet access Valdis . Kletnieks (May 25)
- <Possible follow-ups>
- Re: Stealthier Internet access Elazar Broad (May 25)