> I wouldn't want to send scans of my iris to random Internet services either!
You don’t. You generate some secure keys using iris data. You send the internet service a copy of your public key. They can use that to verify that you are human, but not who you are.
You don’t. You generate some secure keys using iris data. You send the internet service a copy of your public key. They can use that to verify that you are human, but not who you are.