Between 1971 and 1998, the networks the modern world was being built on had no defences worth the name. This is the story of ten cases that changed that.In 1971, a blind eight-year-old in Boston discovered he could whistle into a telephone and place free long-distance calls. In 1986, an astronomer at Berkeley traced a 75-cent accounting discrepancy to a West German intelligence operation. In 1988, a Cornell graduate student released a program that took down ten per cent of the inte...