What happens when you select a file and click delete? "Duh!!!" You must be thinking but I do have a point here. Pressing the "Delete" button doesn't actually eradicate the file... the OS just forgets that its there. It is possible to recover that "deleted" file. That is good news if you accidentally deleted a file but bad news if you want a sensitive document to be permanently destroyed.
So what are your options if you want to achieve the latter? There are secure file deletion tools like Eraser that can be used to simply overwrite the file several times to make it irrecoverable. How many times does the U.S. Department of Defense (DoD) recommend? 7. A New Zealander, Gutmann, recommends 35!!!
How effective is the Gutmann method? As The Sushiman put it... "even God wouldn't recover after 35 passes".
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