Between 2000 and 2002, researchers Simson Garfinkel and Abhi Shelat of MIT purchased a large number of second-hand hard disks from various dealers through eBay and examined these for any residual information they contained. They were able to recover over 6000 credit card numbers and cached Web pages where some of these were used, medical records, love letters and pornographic images amongst other material. One hard drive appeared to have come from a bank machine in Illinois.
'''Exercise: ''' Install the https://security.ngoinabox.org/en/recuva_main.html tool. Practice deleting and then restoring deleted data from your computer or USB memory stick.
[[File:destroydata4.png|destroy data]]