Authorization of audio input for a machine learning model

A processing system, comprising:

• memory comprising computer-executable instructions;
• and one or more processors configured to execute the computer-executable instructions and cause the processing system to:
• obtain an audio input for a machine learning model, wherein the audio input comprises one or more sounds including a first voice;
• determine at least one audio feature associated with the first voice;
• determine the at least one audio feature associated with the first voice is within a similarity threshold of at least one stored audio feature associated with an authorized user of the machine learning model;
• generate a text representation of the first voice;
• determine an attack score for the first voice based on the text representation;
• determine that the attack score does not satisfy an attack threshold;
• and
• based on the attack score not satisfying the attack threshold, send at least one of the text representation or the first voice as input to the machine learning model.

One or more non-transitory computer-readable media comprising executable instructions that, when executed by one more processors of an apparatus, cause the apparatus to perform operations comprising:

• obtaining an audio input for a machine learning model, wherein the audio input comprises one or more sounds including a first voice;
• determining at least one audio feature associated with the first voice;
• determining the at least one audio feature associated with the first voice is within a similarity threshold of at least one stored audio feature associated with an authorized user of the machine learning model;
• generating a text representation of the first voice;
• determining an attack score for the first voice based on the text representation;
• determining that the attack score does not satisfy an attack threshold;
• and
• based on the attack score not satisfying the attack threshold, sending at least one of the text representation or the first voice as input to the machine learning model.