The threat to information systems is both internal, such as the disgruntled
or greedy employee; and external, as typified by hackers or crackers. We should
dismiss the notion that hackers are only geeky 14 year olds trying to crack
one computer at a time as an indoor sport. Many of todays hackers are
far more advanced in computer skills. Using hacking tools available on the
Internet, these hackers are capable of running automated attack applications
against thousands of host computers at a time to identify security weaknesses.
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