On Tue, 23 Mar 2004 09:22:58 +0300, Hans Reiser said: > > Secure delete doesn't work against people who have the necessary > equipment to scan the media and find remnants due to track misalignment.
Notice that the people who have the necessary equipment and assume that the adversaries are equally well-stocked don't seem to agree: 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. That's our official government recommendation for what's sufficient when we're throwing away stuff that the Other Guys might actually do this to. I have to assume that if the DoD or RCMP thought this wasn't sufficient to protect *our* secrets, they'd have a stricter standard.
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