Data Erasing and Recovery
It got me thinking along a similar line, except from the owner's perspective.
Anybody who's been using computers for a while, and knows a thing or two about how they work, realises that simply "deleting" a file doesn't erase it from the HDD completely. Friends are always asking me to recover files for them which they've accidentally deleted, which is simple enough using even free file recovery programs (they still have no idea how I do it ).
Now, I've looked into file shredders and that sort of thing that do so many passes when deleting files. I THINK it works by overriding the data a certain number of times with random data. (Please correct me if I'm wrong).
Even using these methods, how easy is it for somebody, say, from the NSA or the FBI or whatever, to recover data once its been overridden, like, 35 times? I'm just interested to know! I heard somebody talking about all sorts of ways they use to extract data from a HDD they've confiscated or something.
Is it really IMPOSSIBLE to erase data from a HDD? Once its on there, its on there forever? Is there truly any way to erase data without blowing the HDD up? (Even then, I'd bet there's a way to get it back).