Analysis of voice verification technology from a security angleThe question of course is which biometric system to use. Face, fingerpint and iris recognition are all topics of intense research. But the most obvious choice for a mobile phone is surely voice identification. However, this approach has been plagued with problems.Mobile devices already contain the hardware required to deliver two biometric modalities: a camera for facial recognition and a microphone for voice. These modalities present challenges not usually associated with fingerprint biometrics — in the case of facial recognition challenges include lighting and the well-publicized photograph hack; for voice, background noise (etc.) can be a problem — but they offer the advantage that the hardware is "free" and never going to be yanked out of mobile devices. That's quite an advantage, and it points to why face and voice biometrics are the front-runners for handset biometrics.
For example, people’s voices can change dramatically when they are ill or in a hurry. What’s more, it’s relatively easy to record somebody’s voice during authentication and use that to break the system. So many groups have steered away from voice biometrics.
That could be set to change.
This post has a longer discussion of mobile ID management and hardware.
