Embodiments of the present disclosure include a system and a method of accessing a system. An embodiment is a system including an imaging system including a controller and a first camera, the controller having a communication connection configured to transmit or receive content or control signals, and a mobile device including a second camera, the mobile device having a communication interface configured to transmit or receive content or control signals with the controller, the controller being configured to compare images from the first and second cameras to allow access to the controller from the mobile device.