Internet phishing scams are becoming more difficult to detect as criminals develop new ways to trick consumers into revealing passwords, bank account numbers and other sensitive information, security experts say.Scam artists posed as banks and other legitimate businesses in thousands of phishing attacks last year, sending out millions of spam e-mails with subject lines like "account update needed" that pointed to fraudulent Web sites.
These attacks now increasingly use worms and spyware to divert consumers to fraudulent sites without their knowledge, experts say.
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