A system and method to support authentication or device pairing. A respective indication is received from a respective output of each respective contact element within a plurality of contact elements. The respective output indicates a touching of the respective contact element. Based on receiving the respective indication, a respective state associated with the respective contact element is changed. The respective contact element is controlled to change its respective visual state to correspond to its respective state. Based on receipt of the respective indication, it is determined whether the respective states of the plurality of contact elements match a determined pattern. Based on a determination that the respective states of the plurality of contact elements match the determined pattern, access to an operation is authorized.