Yes, this is true. There is no such thing as fool-proof security out there. Having a fool proof security is a dream, that is all… Wake up!
You see, what happened at Target is that customers like everybody else swiped the card at Target payment terminal. Somehow there is a link connected to HVAC contractor server where they got hacked went straight to the card swipe machines and pick up all the information, like your credit card number, AVS, full name, address, and so on… Viola! all information needed, charge more! That broken link was not supposed to happen, but because there was human error on it making security a true flaw.