Passwords are... OK. They're not bad. But passwords have flaws. They're relatively easy to crack, for one, given enough time and effort and a powerful enough computer. Biometrics are the best unique tool we have at our disposal right now to personally identify ourselves, and Samsung thinks that its biometrics -- its fingerprint scanner, a new iris scanner, and the Knox hardware encryption layer -- are good enough to replace the password on your mobile. Not just for unlocking your phone, but for browsing the 'net too.