How aging, injury and capture impact the challenge of change in biometric identifiers

One of the oft-cited advantages of using biometrics for verification and authentication is that they are unique to a person’s body and therefore more stable and difficult to steal than physical ID documents. But bodies change over time: even someone who never loses their passport is certain to lose their youth.

Biometric identification methods rely on matching a biological signature made up of measurements converted into vectors with a registered copy of that signature. But the temporal persistence or stability …

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