ViGo is a multifactor authentication solution that is based on a set of standard biometric configurations that deliver high-levels of security without compromising user convenience.
ViGo delivers a false accept rate of 0.01% at a false reject rate of ~5% when it is incorporated into an app using the ViGo-recommended UI and development best practices.
Each of the modes (phrase and digits) provided with ViGo are configured for this level of voice biometric accuracy, and ViGo includes out-of-the-box functionality to maintain these levels of accuracy over time.
The delivery of these accuracy levels is achieved through the incorporation of the ViGo voice biometrics into a multifactor authentication solution. In such a solution a third factor is used to supplement the first and second: ownership of the device (something you have), and the ViGo voice biometrics (something you are). This additional factor comes into play if the ViGo voice biometric identity verification has not been successful, such as when the environment is particularly noisy for example.
This third factor can be any security measure or mechanism that is possible to implement in a mobile app such as a PIN or swipe pattern, both of which are implemented as examples in the ViGo demo app. The incorporation of a third factor is mandatory in a ViGo deployment, and is used by to trigger voice print adaptation mechanisms within the ViGo voice biometric system.
While the inclusion of a third factor like a swipe or PIN is mandatory for a ViGo deployment, what it is, and how it is implemented is at your discretion. The PIN or swipe in the ViGo demo app is just an example of how it could be done / might look. You can use any mechanism and implement it in any way you like.
The end result of adaptation process is that the above false reject rates (false negatives) are maintained without compromising security.