Method and system for user authentication based on speech recognition and knowledge questions
First Claim
1. A method, comprising:
- receiving a speech recognition result derived from ASR processing of a received utterance;
obtaining a reference information element for said utterance;
determining at least one similarity metric indicative of a degree of similarity between said speech recognition result and said reference information element;
determining a score based on said at least one similarity metric;
outputting a data element indicative of said score.
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Abstract
A method and system for user authentication based on speech recognition and knowledge questions. The method comprises receiving a speech recognition result derived from ASR processing of a received utterance. A reference information element is obtained for the utterance. Then, the method determines at least one similarity metric indicative of a degree of similarity between the speech recognition result and the reference information element. A feature vector is determined from the at least one similarity metric, and a score is computed based on the elements of the feature vector. A classifier may be used to process the elements of the feature vector, with the classifier having been trained to tend to produce higher scores when processing training feature vectors derived from utterances known to convey associated reference information elements than when processing training feature vectors derived from utterances known not to convey said associated reference information elements.
44 Citations
38 Claims
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1. A method, comprising:
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receiving a speech recognition result derived from ASR processing of a received utterance;
obtaining a reference information element for said utterance;
determining at least one similarity metric indicative of a degree of similarity between said speech recognition result and said reference information element;
determining a score based on said at least one similarity metric;
outputting a data element indicative of said score. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A score computation engine for use in user authentication, comprising:
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a feature extractor operable to determine at least one similarity metric indicative of a degree of similarity between (i) a speech recognition result derived from ASR processing of a received utterance; and
(ii) a reference information element for said utterance; and
a classifier operable to determine a score based on said at least one similarity metric and to output a data element indicative of said score. - View Dependent Claims (35, 36)
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37. An authentication method, comprising:
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receiving from a party a purported identity of a user, the user being associated with a knowledge question and a corresponding stored response to said knowledge question;
providing to the caller an opportunity to respond to said knowledge question associated with the user;
receiving from the caller a first utterance responsive to said providing, said first utterance corresponding to said knowledge question associated with the user;
providing to the caller a second opportunity to respond to said knowledge question associated with the user;
receiving from the caller a plurality of second utterances responsive to said providing, each of said plurality of second utterances corresponding to an alphanumeric character corresponding to said knowledge question associated with the user;
determining a score indicative of a similarity between said plurality of second utterances and the stored response to the knowledge question associated with the user;
declaring the party as either authenticated or not authenticated on the basis of said score. - View Dependent Claims (38)
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Specification