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RE: Drive hashing-when is it *really* necessary?

Subject: RE: Drive hashing-when is it *really* necessary?
Date: Thu, 24 Mar 2005 13:22:53 -0500
From FBI testimony regarding the Moussaui investigation in 2001:

"Because SafeBack and the Logicube SFK-000A hand-held disk duplicator
have been validated by CART as computer forensic imaging tools reliably
capable of producing verifiable results, and because SafeBack and the
Logicube SFK-000A incorporate reliable internal CRC verification
techniques, CART procedures do not require examiners to generate
separate MD5 or
SH-1 hashes for computers imaged using SafeBack or Logicube SFK-000A
disk duplicator."

The FBI relies on validation testing, and their explanation in the full
testimony to me is very persuasive; especially for high volume
scenarios:

http://homepage.cs.uri.edu/courses/hpr108b/readings/MD5_case.html

Jeff

-----Original Message-----
From: Matteo G.P. Flora [mailto:flora@alvillage.com] 
Sent: Thursday, March 24, 2005 11:07 AM
To: forensics@securityfocus.com
Subject: Re: Drive hashing-when is it *really* necessary?

<snip>
That doesn't mean that hashing IS a must. It certainly IS the BEST WAY
to do it, but not the only one. Hardware blockers, for example, by
major firms have been certified by NSA & various agencies and these
certification ARE legally sound.
</snip>



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