I don't have empirical evidence of that. I'd have to look into it. I know it can be quite good in certain circumstances. If you have a very noisy environment, it doesn't work so well. The perfect system is never out there. It is an option that can be looked at. I think noise and background noise are one of the issues in the study I read about from the Province of Quebec. They wanted something that was more foolproof, like finger vein authentication, for instance, a fairly low-cost device you put on your phone that only you can access, that kind of thing. It's an idea at the moment. It's not a product.
On February 14th, 2012. See this statement in context.