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A new survey by computer security company Symantec finds the number of attempted email "phishing" attacks doubled in the first six months of this year. Phishers send emails that appear to come from a financial institution or other legitimate organization. The messages ask for personal information such as account numbers and passwords.

Dean Turner runs Symantec's Security Response team, and is author of the semi-annual Internet Security Threat Report. He says criminals are increasingly targeting home users, and stealing information and money by exploiting security holes in Web browsers and other computer applications.