[adolph]

This is an interesting and simple physical measurement device to determine if the credit card slot is in a different orientation than expected. It uses the keypad as a reference location.

I think the most obvious circumvention would be for the criminal enterprise to focus on altering the length of the verification devices, since an EasySweep does not appear to have a formal method to verify its own correctness. A shortened card tab on EasySweep would provide feedback that the terminal was ok since the keypad finger support presses against the terminal.