[narrator]

The perfect use case for biometrics is identifying people who don't want to be identified specifically because they can't change their "password". For example, prisoners, fugitives, enemy combatants, people trying to use software they are not licensed to use or listen to music they have not properly licensed.

In the future the bottom 64 bits of your ipv6 address will be a unique biometric identifier that all licensed internet devices must collect and send with each and every packet.

[therobot24]

A government grade application does just this - look at the NIST competitions, they focus on verification scenarios (one to one matching) which span over large datasets.

Appending a biometric id to your ipv6 address seems a bit redundant and unnecessary - you don't need to authenticate to the internet...why not encode more hardware or location information?