Robert Tappan Morris

One of the earliest known hackers was Robert Tappan Morris, creator of the “Morris Worm” – a virus that is said to have infected around 6,000 computers. He released it while studying at Cornell in 1988, and was apparently attempting to determine the size of the internet. An innocent enough aim, but he had made his worm death-proof and so it kept replicating itself into unwanted places. He was indicted under the Computer Fraud and Abuse Act and was the first person to do so. As with many of these hackers, his sentence was relatively light – probation, community service and a fine – and he went on to found several companies in the computing sphere.

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Top 10 Most Dangerous Hackers
( 10 items )
Item Position (rank): 5