A vending machine user interface can include a first controller operatively connected to an input device capable of receiving payment or account information. The first controller can, with another device, via a second controller, or otherwise, allow secure communication of data from the input device. The first controller, in this regard, can control the communication between the input device and the other device to protect the input device from unwarranted communication from the other device. The first controller can establish a secure channel with the other device using encrypted communications. The first controller, second controller, etc. can be connected to independent printed circuit boards (PCB). Activation of sensors connected to the PCBs can cause the first and/or second controllers to erase data necessary to ascertain/decode communications from the input device, such as encryption/decryption information, or may otherwise decommission the input device or a portion thereof.