I think the pretty reliable method of biometrics are fingerprints, right? Not great online, but can't really be altered in real life. I'm not proposing to use

I think the pretty reliable method of biometrics are fingerprints, right? Not great online, but can't really be altered in real life. I'm not proposing to use them online, just thinking that they work really well with borders/passports. Very difficult to beat these checks.