Intrusion Detection: Implementation and Operational Issues

Monday, 15 July 2002, 12:27 PM EST

Attacks on the nationís computer infrastructures have become an increasingly serious problem. While government agencies have been common targets, the distributed denial-of-service attacks that materialized last year primarily targeted commercial sites.

"Hackers attacked some of Americaís most popular Web sites yesterday for the third day in a row, walling off frustrated consumers from companies that provide news and stock trading as law enforcement officials launched a nationwide criminal investigation... The computer attacks earlier this week temporarily blocked access to Web sites that read like a Whoís Who of the new economy, including Yahoo, eBay, Amazon, CNN.com and Buy.com," reported the Washington Post on Feb. 10, 2000.

This story reflects the serious and sophisticated nature of todayís cyber-attacks. During the past 12 years, the growth of incidents reported to CERT has roughly paralleled the growth of the Internet.

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