Approaching zero: data crime and the computer underworld

Data crime is the technological scourge of the 1990s: eight million of the world's 50 million PCs will be infected with computer viruses by 1993; teenage hackers using home computers have already broken into the secure computer systems at the Pentagon, NASA, and NATO; computer fraud is estimated to cost US and UK banks and companies two billion pounds every year - and 85% of computer fraud isn't even reported.