http://krebsonsecurity.com/2013/12/sources-target-investigating-data-breach/
By Brian Krebs
krebsonsecurity.com
December 18, 2013
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.
Minneapolis, Minn. based Target Brands Inc. has not responded to multiple
requests for comment. Representatives from MasterCard and Visa also could
not be immediately reached for comment.
Both sources said the breach was initially thought to have extended from
just after Thanksgiving 2013 to Dec. 6. But over the past few days,
investigators have unearthed evidence that the breach extended at least an
additional week — possibly as far as Dec. 15. According to sources, the
breach affected an unknown number of Target customers who shopped at the
company’s bricks-and-mortar stores during that timeframe.
[...]
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