System and method for optimizing matched voice biometric passphrases

A system for optimizing matched voice biometric passphrases, comprising:

• a computer having a processor and a memory;
• and
• one or more code sets stored in the memory and executed the processor, which configure the processor to:
• generate a set of k candidate passphrases;
• calculate a phonetic conte of each candidate passphrase of the set of k candidate passphrases;
• at least one of during and after a voice biometric enrollment of the user, calculate user phonetic content of a text-independent voiceprint of the user, wherein the text-independent voiceprint of the user was captured during the voice biometric enrollment;
• identify a subset of j passphrases from the set of k candidate passphrases, wherein each of the subset of j passphrases meets a match threshold in phonetic content with the voiceprint of the user;
• one of prior to and during a user authentication, select a first one of the subset of j passphrases;
• and
• present the selected first one of the subset of j passphrases to the user use in the user authentication.

A method for creating voice passphrases, the method comprising

• generating, by a computer processor, a plurality of candidate phrases, each candidate phrase comprising a plurality of words;
• calculating, by the processor, a phoneme sequence of each phrase;
• calculating, by the processor, a user phoneme sequence of a text-independent voiceprint of a user;
• identifying, by the processor, a subset of phrases from the plurality of phrases, wherein each of the subset of phrases matches in phonetic content with the user voiceprint;
• selecting, by the processor, a first one of the subset of phrases;
• providing, by the processor, the selected phrase to the user;
• and
• receiving authentication from the user voicing the selected phrase.