Fingerprints Are Usernames, Not Passwords (2013)
Why not both?First, a fingerprint is unique, also serves as _identification_.Secondly, a fingerprint is secure to a very high degree - cannot be easily stolen and duplicated, always is with you and so on. Thus, it serves as _authentication_ too.EDIT: to the downvoters and critics: what you describe is using an _excess_ of effort to get my fingerprint ( technically, using force, etc ) . If I see a password, I can use it immediatelly, if you see my finger, there is a long way ( in terms of steps)  until you can use the fingerprint attached to it. And btw, I am not defending Apple here.