Full Disclosure mailing list archives
Re: Secure Delete for Windows
From: Valdis.Kletnieks () vt edu
Date: Tue, 17 Jan 2006 17:15:55 -0500
On Tue, 17 Jan 2006 22:12:38 +0100, GroundZero Security said:
Our application has not only the DOD wiping standard, but also peter gutmanns algorythm with 38 random overwrites, which is the most secure wiping methode we know of.
Or as Peter Gutmann says himself: "In the time since this paper was published, some people have treated the 35-pass overwrite technique described in it more as a kind of voodoo incantation to banish evil spirits than the result of a technical analysis of drive encoding techniques. As a result, they advocate applying the voodoo to PRML and EPRML drives even though it will have no more effect than a simple scrubbing with random data. In fact performing the full 35-pass overwrite is pointless for any drive since it targets a blend of scenarios involving all types of (normally-used) encoding technology, which covers everything back to 30+-year-old MFM methods (if you don't understand that statement, re-read the paper). If you're using a drive which uses encoding technology X, you only need to perform the passes specific to X, and you never need to perform all 35 passes. For any modern PRML/EPRML drive, a few passes of random scrubbing is the best you can do. As the paper says, "A good scrubbing with random data will do about as well as can be expected". This was true in 1996, and is still true now." http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html
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Current thread:
- Secure Delete for Windows GroundZero Security (Jan 16)
- Re: Secure Delete for Windows J.A. Terranson (Jan 16)
- Re: Secure Delete for Windows Valdis . Kletnieks (Jan 16)
- Re: Secure Delete for Windows Jason Coombs (Jan 17)
- Re: Secure Delete for Windows J.A. Terranson (Jan 17)
- Re: Secure Delete for Windows GroundZero Security (Jan 17)
- Re: Secure Delete for Windows Michael Holstein (Jan 17)
- Re: Secure Delete for Windows GroundZero Security (Jan 17)
- Re: Secure Delete for Windows Valdis . Kletnieks (Jan 17)
- Re: Secure Delete for Windows greybrimstone (Jan 17)
- Message not available
- Re: Secure Delete for Windows J.A. Terranson (Jan 17)
- Re: Secure Delete for Windows bkfsec (Jan 18)
- Re: Secure Delete for Windows J.A. Terranson (Jan 16)
- Re: Secure Delete for Windows GroundZero Security (Jan 17)
- Re: Secure Delete for Windows Yvan Boily (Jan 17)
- PC Firewall Choices Steven (Jan 17)
- Re: PC Firewall Choices Morning Wood (Jan 17)
- Re: PC Firewall Choices Nic Werner (Jan 17)
- RE: PC Firewall Choices Greg (Jan 17)