Nothing, you abandon many viable samples of it wherever you go. This relates to the biggest problem with biometrics: it represents an effectively static attrib

Nothing, you abandon many viable samples of it wherever you go. This relates to the biggest problem with biometrics: it represents an effectively static attribute about an individual. It cannot be reset and therefore we place this enormous responsibility on the reading mechanism and pipeline to the authentication process to attest that the human using it is doing so with consent.