Security & Hacking: "Thieves rig Barnes & Noble PIN pads to steal credit card data"

http://nakedsecurity.sophos.com/2012/10/24/barnes-noble-pin-pad-credit-card/

Not clear yet if this attack used Skimmers or Hacking.

Note that the FBI asked Barnes and Noble to sit on this for a month, so actual attack happen a while ago, and not clear yet how long it had been active.

Days?  Weeks?  Months?  Years?

I suspect Skimmer's of some type myself in this attack, but could have been software hack or something else.

For more on Skimmers see Krebs article "Would you have Spotted this ATM Fraud?" for even more you can see Brian Krebs entire series on Skimmers at his "All about Skimmers" were he has collected all his articles in one spot, with short intro to each article and link to full individual story.