Story: Photos: Biometrics up close and personal
If all these systems do is confirm that your iris matched that held on the card then all you need to do is forge the card (or passport) as people do now with cards/passports with photos.
For ID cards to be useful they need to match your iris scan with one on the proposed UK National Identity database (say 30 million people) at least when the card is initially issued (or you could be fraudulently applying for multiple cards).
When matching against a database of 30 million even a 0.001 failure rate is unacceptable and I suspect the failure rate is far greater when you are picking a match from a database of millions, not just confirming that the iris scan matches the single one held on the card.
On a technical level alone the proposed UK ID cards will be a total failure but I'm sure accenture (and EDS) will make a good few billion from it.
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