CNN CNN Newsroom December 28, 2013 19:32:00
They are heavily encrypted and impossible to decode. alexander field is live for us now in new york. so, is that the case, very difficult to, i guess, decode? >> reporter: well, fred, target is telling shoppers they believe that the information is safe, secure and protected, but some security experts are saying it's possible that that information might not be. there are sophisticated hackers out there right now trying access those p.i.n. numbers, so really no reason for shoppers to wait and find out. just a day after saying there was no evidence that personal identification numbers, or p.i.n.s...