Patent ID: 9318114
Filing Date: 2016-04-19
CPC Classification: G10L

Claim Text:
1. A method comprising: receiving a username associated with an asserted identity from a user; based on the username, accessing a user profile comprising voice characteristics; identifying, using the voice characteristics, a plurality of asserted identity-specific more valuable phonemes determined to be more valuable than second phonemes for verifying the asserted identity; generating a challenge sentence, based on the voice characteristics, wherein the challenge sentence is generated randomly according to one of a rule and a grammar, and wherein the challenge sentence comprises the plurality of asserted identity-specific more valuable phonemes; prompting the user to speak the challenge sentence to yield a spoken challenge sentence; comparing voice characteristics of the spoken challenge sentence to the voice characteristics of the user profile to yield an asserted identity voice score; comparing the voice characteristics of the spoken challenge sentence with voice characteristics of a set of imposter identities to yield imposter identity voice scores; and when the claimed identity voice score is within a threshold specific to the user profile, authenticating the user as the asserted identity.