Dear credit cards users:
Next time when you gonna pay by credit card take a look on security camera behind the salesman. Today almost all point of sale equipped with a surveillance cameras. The best place to install it - up at the wall right behind the salesman. But, this camera could not only capture your face for security purpose , but located at the best position and view angles to take a snapshot of both side of your credit card when salesman or you rotate it looking for appropriate side to insert it in pos-terminal.
Yes, current standart security camera resolution not enough for good snapshot, but time flies.
PS. It's almost social engineering thing - we used to see surveillance cameras in any shop and never think about it as a possible security threat.