[Aerroon]

Hopefully never. Or at least not in the near future. Almost every other method is going to have privacy implications because they will rely on something you have or something you are. You can't compel passwords in a similar way that you can compel people to give physical tokens or fingerprints or retina scans.

[krupan]

Fingerprints and retinal scans are not something I proposed. Your point is valid for those. Your point is not valid for hardware tokens vs. passwords. Especially when you consider that passwords used for authentication have to be written down somewhere and shared with a third party for them to work at all.

[throwawayffffas]

I agree and go even further that "something you have" is equivalent to a password. Even though "something you have" tends to be a public-secret key pair.