If you have an identity server, a website and a browser that all support Persona, (and you've already been through the process once), Persona would work much be

If you have an identity server, a website and a browser that all support Persona, (and you've already been through the process once), Persona would work much better than that. You don't have to memorise a new password and you don't have to click on a verification email. You just land on a new site, click log in with Persona, choose your email address, and TADA! you're in. And the beauty of it is that your email provider doesn't even know which sites you're logging in to.