Electronic apparatus with clock authentication function and authentication method of clock signal

Abstract

An electronic apparatus with a clock authentication function includes a first signal wire for a clock, a clock device, an electronic device, and an authentication unit. The clock device includes a clock generation unit containing circuitry configured to output a clock signal to the first signal wire and a first signal generation unit containing circuitry configured to generate a first signal synchronized with a clock signal generated by the clock generation unit. An electronic device includes an electronic circuit to which a clock signal is input via the first signal wire and a second signal generation unit containing circuitry configured to generate a second signal synchronized with a clock signal being input to the electronic circuit. The authentication unit includes circuitry configured to authenticate a clock signal being input to the electronic circuit based on whether or not the first signal and the second signal are synchronized with each other.

Dependencies are inferred from the claim text.