Voice verification - for mobile banking security?

Voice based authentication has been tried in the past - I am aware of at least one provider in the US. At the time, several years ago, the technology wasn't fully mature and there were instances of genuine account holders with a sore throat finding their access blocked! If the technology has matured since then, voice verification is surely an option that strikes a good balance between security and convenience.  

Sadly it's still impossible to answer the question 'is such a solution secure enough?' because -- scandalously -- there are still no agreed standards for measuring accuracy (False Detect and False Reject rates) for biometrics.  And whatever testing that is done is almost always performed under the "zero effort imposter" assumption in which no active effort is made to spoof the biometric under test.  So beware: when reviewing FAR and FRR (when the vendor is good enough to actually report them) you will find that they reflect accidental errors only.  Reported biometric performance specs reveal nothing about their resistance to concerted efforts by fraudsters.

See the FBI's "SABER" report which cautions that: "For all biometric technologies, error rates are highly dependent upon the population andapplication environment. The technologies do not have known error rates outside of a controlled test environment."

It's outrageous, when the primary concern allegedly addressed by biometrics is crime, that biometric bench testing bears no resemblance to real life efficacy against criminals.