Clarke: attack on the internet 'worrisome'.

• Author: Book, Elizabeth G.
• Position: Security Beat

Despite efforts by the Defense Advanced Research Projects Agency to develop information security technologies, vulnerabilities remain, said Richard Clarke, special advisor to the president for cyberspace security and chairman of the president's Critical Infrastructure Protection Board.

"Denial-of-service attacks are up," said Clarke during a roundtable with defense reporters.

Clarke cited a November denial-of-service attack designed to bring down the Internet. "This was the first time we saw a really major attack on the Internet itself, which frankly is more worrisome than an attack on an individual enterprise. It means that hackers are beginning to think about...