CBS News

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As hacking of top retailers make headlines, Bill Whitaker discovers how insecure your credit card information is this holiday season

Target declined our request for an on-camera interview, but the breach of its security a year ago is a case study in how hackers operate. It started when criminals stole the username and password from one of Target’s vendors — a Pennsylvania heating and air conditioning company. The credentials got them into Target’s network without attracting attention. Once inside they easily spread to thousands of checkout terminals in nearly every store. The hackers then installed malicious software, or malware, to record card swipes.

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