An article relating to this blog post on Finextra:
NAB introduces voice biometrics for phone banking
National Australia Bank (NAB) has introduced biometric voice verification for its telephone banking customers.
While this may have some use in preventing any Tom Dick or Harry ringing up and and impersonating a customer, it does not prevent the sort of fake call centre scam proving popular with criminals at the moment.
ie. the bank call centre is not authenticated to the customer.
It merely closes just one of the many doors open to criminals.
I suppose the customer could check if the NAB call centre was genuine - simply ask a friend to try and change your account details, if they fail the voice recognition - you'll know they're talking to the bank, but NAB might lock your account.
It may be problematic in cases where there is an audio record of your conversation, either recorded by your employer, your mobile provider ie. google android, or the carrier, and of course the bank will record your responses for posterity to cover potential
liability. It won't be long before the master tape gets lost on the way to the data centre or some other mishap and they'll be back where they started and your voice will be worthless for authentication.
Bumometrics in action.