Right but we have proof-of-concept. Presumably some Ga-gillion dollar machine that the NSA have can read data thats been over-written. Paranoid much?1. Nobody has yet proven to be able to restore a harddrive where all sectors have been overwritten.
Now that I didn't know. You sure about that?3. Contrary to what many believes, a full format in windows xp doesn't overwrite all your sectors. It differs from a quick format only by bad sector checking.
I am not sure about that. Also, if you ask the true experts in the recovery business, overwriting is much more effective, since it destroys data on a much lower level than you can with a drill.Steve Gibson, a guy who knows a thing or two about drives, claims the best (and probably most entertaining, I wouldn't know) way to make sure nobody's ever going to get your data is to simply drill a hole through the platters.
residual charge on the bits means that it is possible to logarithmically subtract a bit from the drive to find its previous state (read: if you know the exact routine the drive nuking program used to over-write the sectors, you can theoretically solve for the previous state of that sector). If you over write a bit with a 0, its possible to subtract out that 0 to solve for its previous state. That's why you see programs that over-write the drive sometimes as many as 30 times. If you were to over write the drive using truly random noise (read: NOT pseudo random noise) you've removed my subtraction theory, and it becomes an issue of guess and check, and in doing so you'd nearly destroy the residual charge in question. To my limited knowledge its impossible to push data to the point at which it's truly impossible to recover using more and more writes--you just push it further up that exponential curve.I am not sure about that. Also, if you ask the true experts in the recovery business, overwriting is much more effective, since it destroys data on a much lower level than you can with a drill.
sure, while were on this track why don't we ask Derek Perez about why the GTX260 is superior to the HD4870.You guys really likes those drills.
"we at Kroll Ontrack see on a daily basis how ineffective it is to merely drill a hard drive"
oohhh but the NSA has spy satillites that are monitoring my brain's alpha waves and beta waves . surely they must have technologies to recover data after its been over-written . Just to be extra careful I wear alluminum hats and degauss my drives 17 times before over-writing them 50 times with a random number generator I wrote myself that takes 20 minutes and over 3 quintillion factors to generate its randomness. Don't want anybody to find my tax records#10 That is purely theoretical. Nobody can actually do it in real life (they cannot even do it after a single overwrite with just zeroes).
And your drill holes: yes, you will stop normal users, but the experts that have fancy equipment...