That, and not the revocability, is the core of the problem. It also comes back to a foundation of security: something you have and something you know. Personal

That, and not the revocability, is the core of the problem. It also comes back to a foundation of security: something you have and something you know. Personally, I think most biometrics are bunk, unless you use multiple (fingerprint, iris, etc) along with some kind of password.