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US 8,751,233 B2Granted
Digital signatures for communications using text-independent speaker verification
AssigneeAT&T Intellectual Property II, L.P.
InventorsPradeep K. Bansal, Lee Begeja, Carroll W. Creswell, Jeffrey Farah, Benjamin J. Stern, Jay Wilpon
Life of this patent
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Abstract
A speaker-verification digital signature system is disclosed that provides greater confidence in communications having digital signatures because a signing party may be prompted to speak a text-phrase that may be different for each digital signature, thus making it difficult for anyone other than the legitimate signing party to provide a valid signature.
Claims17
A method comprising, performing at an authentication service system:
- receiving an authentication session invitation request from a sender of an email, wherein the email is sent to a destination address of a recipient, and wherein the authentication session invitation comprises an email address of the sender and an invitation to create an authentication certificate for the sender and the email;
- sending, to the sender, a session identification and a text-phrase prompt comprising a text phrase;
- receiving, from the sender in response the text-phrase prompt, the destination address of the recipient and an audio signal;
- retrieving, based on the email address of the sender, a voice template associated with the sender;
- comparing the audio signal to the voice template, to yield a confidence score;
- when the confidence score exceeds a threshold:
- generating the authentication certificate;
- and
- packaging the session identification with the authentication certificate, to yield authentication information;
- when the confidence score does not exceed the threshold, packaging the session identification and the confidence score as the authentication information;
- and
- transmitting the authentication information to the destination email address of the recipient.
9 more elements
A system comprising:
- a processor;
- and
- a computer-readable storage medium having instructions stored which, when executed by the processor, cause the processor to perform operations being performed at an authentication service system, the operations comprising:
- receiving an authentication session invitation request from a sender of an email, wherein the email is sent to a destination address of a recipient, and wherein the authentication session invitation comprises an email address of the sender and an invitation to create an authentication certificate for the sender and the email;
- sending, to the sender, a session identification and a text-phrase prompt comprising a text phrase;
- receiving, from the sender in response the text-phrase prompt, the destination address of the recipient and an audio signal;
- retrieving, based on the email address of the sender, a voice template associated with the sender;
- comparing the audio signal to the voice template, to yield a confidence score;
- when the confidence score exceeds a threshold:
- generating the authentication certificate;
- and
- packaging the session identification with the authentication certificate, to yield authentication information;
- when the confidence score does not exceed the threshold, packaging the session identification and the confidence score as the authentication information;
- and
- transmitting the authentication information to the destination email address of the recipient.
12 more elements
A computer-readable storage device having instructions stored which, when executed by a processor of an authentication service system, cause the processor to perform operations comprising:
- receiving an authentication session invitation request from a sender of an email, wherein the email is sent to a destination address of a recipient, and wherein the authentication session invitation comprises an email address of the sender and an invitation to create an authentication certificate for the sender and the email;
- sending, to the sender, a session identification and a text-phrase prompt comprising a text phrase;
- receiving, from the sender in response the text-phrase prompt, the destination address of the recipient and an audio signal;
- retrieving, based on the email address of the sender, a voice template associated with the sender;
- comparing the audio signal to the voice template, to yield a confidence score;
- when the confidence score exceeds a threshold:
- generating the authentication certificate;
- and
- packaging the session identification with the authentication certificate, to yield authentication information;
- when the confidence score does not exceed the threshold, packaging the session identification and the confidence score as the authentication information;
- and
- transmitting the authentication information to the destination email address of the recipient.
9 more elements
Dependencies are inferred from the claim text.