gadzook33 asks: "There have been rumors floating around about DIY iris scanning, using digital cameras for biometric security. Iris scanning presents a fantastic alternative to password-based authentication but hasn't really come to our desktops yet. I've looked around but can't find any concrete material on the subject. Is anyone doing this? Are there any efforts to develop open software for this sort of thing? Are patents holding things up? Given that passwords are an almost defunct technique for protecting data in certain situations, it would be nice to have an alternative."
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