IPv6 Passwordless login

Me and my friends are currently working at creating an IPv6 network in our school. It's a thesis, so we have a teacher that helps us finding out what we have to do. Lately he said, that ipv6 enables user to login passwordless. I don't know what he meant with that, but he said that if a user logs in on a specific computer, he can gain access to all of his accounts passwordless just by logging in into his computer. I mean, would it theretically work? I don't think it's possible with ipv6, but what do i know. Can you please help me? Thanks :)

Solution 1:

What your teacher is describing is Single Sign On (SSO). It has nothing to do with the layer 3 network protocol used. The technologies are orthogonal.

Either your teacher is really confused, or he's trying to confuse you 😉 Read up on SSO and demonstrate your ability to do independent research to your teacher!