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MIAMI, FL - DECEMBER 19:  A Target store is seen on December 19, 2013 in Miami, Florida. Target announced that about 40 million credit and debit card accounts of customers who made purchases by swiping their cards at terminals in its U.S. stores between November 27 and December 15 may have been stolen.  (Photo by Joe Raedle/Getty Images)
MIAMI, FL - DECEMBER 19:  A Target store is seen on December 19, 2013 in Miami, Florida. Target announced that about 40 million credit and debit card accounts of customers who made purchases by swiping their cards at terminals in its U.S. stores between November 27 and December 15 may have been stolen.  (Photo by Joe Raedle/Getty Images)

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    Can companies, Target prevent hackers?

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Can companies, Target prevent hackers?

Expert Shawn Henry says companies can't prevent security breaches, all they can do is hope to detect them.

Can companies, Target prevent hackers?

Expert Shawn Henry says companies can't prevent security breaches, all they can do is hope to detect them.