The Free Press, Mankato, MN

State, national news

December 27, 2013

Target: Customers' encrypted PINs were stolen

Security experts call it second largest theft of card accounts

ATLANTA — Target said Friday that debit-card PINs were among the financial information stolen from millions of customers who shopped at the retailer earlier this month.

The company said the stolen personal identification numbers, which customers type in to keypads to make secure transactions, were encrypted and that this strongly reduces risk to customers.

In addition to the encrypted PINs, customer names, credit and debit card numbers, card expiration dates and the embedded code on the magnetic strip on back of the cards were stolen from about 40 million credit and debit cards used at Target stores between Nov. 27 and Dec. 15.

Security experts say it's the second-largest theft of card accounts in U.S. history, surpassed only by a scam that began in 2005 involving retailer TJX Cos.

Target said it doesn't have access to nor does it store the encryption key within its system, and the PIN information can only be decrypted when it is received by the retailer's external, independent payment processor.

"We remain confident that PIN numbers are safe and secure," spokeswoman Molly Snyder said in an emailed statement Friday. "The PIN information was fully encrypted at the keypad, remained encrypted within our system, and remained encrypted when it was removed from our systems." The company maintains that the "key" necessary to decrypt that data never existed within Target's system and could not have been taken during the hack.

However, Gartner security analyst Avivah Litan said Friday that the PINs for the affected cards are not safe and people "should change them at this point."

Litan said that while she has no information about the encrypted PIN information in Target's case, such data has been decrypted before, in particular the 2005 TJX Cos. hacking case that's believed the largest case of identity theft in U.S. history.

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