Security breach at credit card processor could be among worst

Spyware to capture card info found inside Heartland Payment Systems network

"Unfortunately the bad guys are very, very good," he said. "The malware we encountered did not, and does not, get very well captured by antivirus software, so it's a challenge we're going to have to keep working as an industry to combat."

Heartland hasn't identified the merchants that may have been affected by the breach, so it's difficult for consumers to identify whether they might be victims of fraud. Security experts consistently advise people to monitor their credit card statements for unusual charges - even small charges, which can mean criminals are testing the account out to make sure it works - and to limit their purchases on debit cards since debit-card fraud sucks cash directly out of victims' accounts.

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