Re: Interesting One
From: Joe Barrett (barrettj@wam.umd.edu)Date: 10/30/02
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From: "Joe Barrett" <barrettj@wam.umd.edu> To: "Nero, Nick" <Nick.Nero@disney.com> Date: Tue, 29 Oct 2002 20:33:16 -0500
Actually, the DoD standard is to write over the data 7 times, alternating
between 0x00 and 0xFF.
I can only assume that the NSA follows a similar (or perhaps more stringent)
standard
Joe Barrett
----- Original Message -----
From: "Nero, Nick" <Nick.Nero@disney.com>
To: "Dave Adams" <dadams@johncrowley.co.uk>;
<security-basics@security-focus.com>
Sent: Tuesday, October 29, 2002 12:30
Subject: RE: Interesting One
> Well, the NSA standard I believe is that zero-filling a drive (writing
> all 0's to the platter) will make the data impossible to recover, but I
> am sure there are some instances when this isn't the cause depending on
> how retentive the media is and all that. If is electromagnetically
> degaussed for an extended period of time, I can't imagine anything could
> recover the data.
>
> Nick Nero, CISSP
>
> -----Original Message-----
> From: Dave Adams [mailto:dadams@johncrowley.co.uk]
> Sent: Monday, October 28, 2002 5:06 PM
> To: security-basics@security-focus.com
> Subject: Interesting One
>
>
> Greetings Folks,
>
> I had an interesting conversation today with someone from FAST
> (Federation Against Software Theft) They pretend not to be a snitch wing
> of the BSA. Anyway, to get to the point, the guy that came to see me
> said that their forensics guys could read data off a hard drive that had
> been written over up to thirty times. I find this very hard to believe
> and told him I thought he was mistaken but the guy was adamant that it
> could be done. My question is, does anyone have any views on this, or,
> can anyone point me to a source of information where I can get the facts
> on exactly how much data can be retrieved off a hard drive and under
> what conditions etc etc.
>
> Thanks
>
> Dave Adams
>
>
>
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- Maybe in reply to: Dave Adams: "Interesting One"
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