Electromagnetic side channel attack defense method based on ultrasonic waves, electronic equipment and medium

The invention provides an electromagnetic side channel attack defense method based on ultrasonic waves, electronic equipment and a medium, an ultrasonic signal is designed and generated by utilizing the electromagnetic side channel effect of the ultrasonic waves, and only the ultrasonic signal needs to be played when an audio is played, so that the attack defense effect is achieved. Harmonic and aliasing signals caused by an electromagnetic side channel effect can cover the audio and generate an interference effect, so that an attacker can be prevented from recovering the audio through an electromagnetic radiation signal, and the purpose of stable defense is achieved; as human ears cannot hear ultrasonic waves, normal use of audio software is not affected when the ultrasonic interference signals are played; according to the invention, the possibility that the voice information leaks through the electromagnetic radiation signal can be reduced without changing hardware and adding extra equipment. 本发明提供了一种基于超声波的