Hackers broke into Citibank’s network of ATMs inside 7-Eleven stores and stole customers’ PIN codes, according to recent court filings that revealed a disturbing security hole in the most sensitive part of a banking record. The scam netted the alleged identity thieves millions of dollars. However, more importantly for consumers, it indicates criminals were able to access PINs — the numeric passwords that theoretically are among the most closely guarded elements of banking transactions — by attacking the back-end computers responsible for approving the cash withdrawals.
