System and method of fuzzing prevention using intentional responses that appear to be randomized

A device including a fuzzing responder circuit, the device comprising:

• a perceptual hash generator configured to receive a fuzzing input and to perform a perceptual hashing function using the fuzzing input to generate a perceptual hash value;
• a concatenator coupled to the perceptual hash generator and configured combine at least one version number, a shared secret key, and either the fuzzing input or the perceptual hash value to generate a revised hash value;
• a multiplexer including a first input to receive the perceptual hash value, a second input to receive the revised hash value, a control input, and an output;
• a controller coupled to the control input, the controller to provide a control signal to the multiplexer to provide a selected hash value to the output, the selected hash value comprising one of the revised hash value and the perceptual hash value;
• and
• an action selector coupled to the output of the multiplexer and configured to select an action from a predetermined list of actions based on at least a portion of the selected hash value;
• and
• performing the selected action in response to the fuzzing input.

A method comprising:

• receiving a fuzzing input at a responder circuit;
• generating, using a perceptual hash generator of the responder circuit, a perceptual hash value based on a fuzzing input;
• combining, using a concatenator of the responder circuit, a shared key and at least one version number, a shared secret key, and either the fuzzing input or the perceptual hash value to generate a revised hash value;
• providing, from the concatenator, the perceptual hash value to a first input of a multiplexer of the responder circuit and the revised hash value to a second input of the multiplexer;
• providing, from a controller of the responder circuit, a multiplexer selection signal to a control input of the multiplexer to provide a selected hash value to an output of the multiplexer, the selected hash value selected from a group consisting of the perceptual hash value and the revised hash value;
• determining, by an action selector of the responder circuit, a selected action from a predetermined list of actions based on at least a portion of the selected hash value;
• and
• performing the selected action in response to receiving the fuzzing input.