|Conversational Biometrics Group - VIVA Demo|
The Voice Identification and Verification Agent (VIVA) is an implementation
of conversational speech biometrics in the telephony environment which
allows for user identification and verification using spoken natural language.
Conversational speech biometrics combines two sources for authentication:
1) physical speech biometrics (the voice-print) and 2) user knowledge
(e.g., passwords and personal information). The combination of the two
information sources increases the security and reliability and provides
a flexible framework for various authentication scenarios so as to maximize
user convenience. Technologies utilized to enable conversational speech
biometrics include acoustic speaker recognition, speech recognition, natural
language understanding, and dialog management. In our prototype, the verification
consists of one or several short interviews involving randomly asked authentication
questions and an acoustic voice-print check. The length of a session depends
on the correctness of the answers and the estimated voice-print confidence.
Users can enroll into the system via an HTML-form and a telephone server.
Measured on real data, casual impostors are falsely accepted by the system
in less than 0.00001 % of the cases, balanced by a 3% false rejection
of the clients.
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