On Sat, 03 Apr 2004 11:09:34 CST, Michael Cecil <macecil@xxxxxxxxxxx> said: > If you want to sanitize a drive and then reuse it, use a overwriting tool > such as Autoclave <http://staff.washington.edu/jdlarios/autoclave/> or > Eraser <http://www.heidi.ie/eraser/> and use the overwriting setting > recommended by Gutmann > <http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html>. Two notes: 1) Gutmann's 35 passes were devised to stress the recording methodologies of the day. Many of them are for encoding schemes not used anymore. 2) Canadian RCMP TSSIT OPS-II says: "Must first be checked for correct functioning and then have all storage areas overwritten once with the binary digit ONE, once with the binary digit ZERO and once with a single numeric, alphabetic or special character, " (http://jya.com/rcmp2.htm) American DoD 5220-22.M says: "Overwriting all addressable locations with a character, its complement, then a random character and verify." This is permitted for classifications up to SECRET. It is not acceptable for TOP SECRET and higher. I have to conclude that *our* spooks are of the opinion that even 3 passes are sufficient to wipe out data thoroughly enough so that it's not worth it for the *other* spooks to try recovering 'Secret'...
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