A human machine interface (10) for use in situations requiring authorized access. The human machine interface (10) includes a validator controller (12) and a data transmitter (14). The validator controller (12) includes a validator status actuator (16) in communication with a validator receiver (18) via a validator logic circuit (20). The validator status actuator (16) is configured to process and perform actions based upon data signals (22) received by the validator receiver (18). The data transmitter (14), which is in contact with a human nail (24), transmits the data signal (22) to the validator controller (12).

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