  As the use of biometrics becomes more wide-spread, the privacy concerns that
stem from the use of biometrics are becoming more apparent. As the usage of
mobile devices grows, so does the desire to implement biometric identification
into such devices. A large majority of mobile devices being used are mobile
phones. While work is being done to implement different types of biometrics
into mobile phones, such as photo based biometrics, voice is a more natural
choice. The idea of voice as a biometric identifier has been around a long
time. One of the major concerns with using voice as an identifier is the
instability of voice. We have developed a protocol that addresses those
instabilities and preserves privacy. This paper describes a novel protocol that
allows a user to authenticate using voice on a mobile/remote device without
compromising their privacy. We first discuss the \vv protocol, which has
recently been introduced in research literature, and then describe its
limitations. We then introduce a novel adaptation and extension of the vaulted
verification protocol to voice, dubbed $V^3$. Following that we show a
performance evaluation and then conclude with a discussion of security and
future work.
