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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