Circuit for detecting optical fault injection using buffers on reset signal path

The present invention relates to a circuit for detecting an optical fault injection using buffers on a reset signal path required for resetting a chip, which includes: a plurality of sensors arranged on a reset signal path for delivering a reset signal to each of the flip-flops constituting a digital circuit so as to detect an external optical fault injection; a signal collection part for collecting the outputs of the sensors into one so as to distinguish a variation occurring in the signal of one of the sensors; and a detection signal generation part for generating a detection signal representing an optical fault injection according to the signal variation of the sensor inputted to the signal collection part.