>Biometric data can usually be gathered from a person, often discreetly Not only that, but merely authenticating a user into the system will always produce a f

>Biometric data can usually be gathered from a person, often discreetly Not only that, but merely authenticating a user into the system will always produce a full duplicate of their secret. So unless all terminals have the same clearance level, any compromised terminal allows for escalation. Since the number of biometric markers is limited, you are bound to have overlap, hence this ridiculous race towards more exotic and extreme biometrics like "vein auth".