Sources: Target Investigating Data Breach (update 1)

Brian Krebs has the scoop on what sounds like another major data breach – again:

Nationwide retail giant Target is investigating a data breach potentially involving millions of customer credit and debit card records, multiple reliable sources tell KrebsOnSecurity. The sources said the breach appears to have begun on or around Black Friday 2013 — by far the busiest shopping day the year.

According to sources at two different top 10 credit card issuers, the breach extends to nearly all Target locations nationwide, and involves the theft of data stored on the magnetic stripe of cards used at the stores.


Update: Well, that was quick. Within hours, the breach has been confirmed by Target and the Secret Service confirmed they’re investigating. The breach reportedly affects only in-store transactions, not online purchases, and may impact 40 million customers who shopped in their stores between Nov. 27  through Dec. 15.  Expect to see a lot more on this breach in the mainstream media.

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