How Wiretapping Works

Wiretapping occurs all the time in espionage and crime movies. Spies and gangsters know the enemy is listening, so they speak in code over the phone and keep an eye out for bugs. In the real world, we may not think much about wiretapping. Most of the time, we assume our phone lines are secure. And in most cases, they are, but only because nobody cares enough to listen in. If people did want to… » Full Story on HowStuffWorks