posted on Oct, 17 2003 @ 05:28 PM
Many people think that once you bang up your hard drive, all your data is lost, gone forever. Actually, it is possible for it to be recovered.
The way a computer deletes a file is that it tells itself that the space that the file took up can be overwritten. Un-delete software works by just
locating the "deleted" file and recovering it (assuming none of the data is overwritten).
File shredders work by "deleting" the file first and overwriting the data. Higher security shredders usually make a few passes over the data to make
sure that it's completely covered up. However, it is still possible to recover data using a magnatic sensor or an electron microscope, but that's
usually reserved for suspected terrorist computers. Physically destroying your hard drive makes it more difficult to erase data, but not
There's a special branch of government that specializes like these, called the Computer Forensics Laboratory.
It uses a technique called disk splicing to recover data. Basically, they rearrange the fragments of what they have of your hard disk and and use
magnetic sensors and electron microscopes to scan for traces of information.
If you don't want your information found, then keep it off your computer.