The UK government wants to encode iris information on passports and keep copies on database to use in iris recognition systems in a system that is being trialled at the moment.
This might mean that personality profiles could be generated from biometric data.
Mind Hacks responds:
How accurate they might be remains another question, but as with any centralised population sample, the concern is that those with unusual results may be scrutinised more closely using other methods, or deemed to be ‘risky’.