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

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?