OpenID has many advantages. For the average user, the main one is not having to remember a thousand passwords. That’s obvious. But also consider not having to remember the username. Many web sites use the email address as username and that’s nice, but many don’t. And most people are not lucky enough to have a username that’s free everywhere. For my wife, remembering the username is sometimes as hard as remembering the password.
Not having to worry about poorly programmed web sites leaking your password because they stored it in plain text and they have phpMyAdmin open without any password is also a big plus, but not something the average user would see.
But for the developer, it has many, many advantages.
Not having to decide on what identifier to use for your users (users vs emails vs ids). Not having to implement a log in screen, which means not having to worry about SSL encryption which means not having to get a dedicated IP address, a certificate, configure the web server accordingly and ensure that the site switches to https when it must.
Not getting password for the user means you don’t have to store a password. You don’t have to figure out what is the appropriate encryption mechanism so that if your encrypted password leak, they are not readable. Not using plain text is not enough, as some encryption mechanisms are easily broken. Not having to worry about that is huge.
You don’t have to create a signup page, people just log in. You don’t have to validate the password by asking for it twice or validate its strength or any other stuff like that.
You don’t have to create a remember password page, which means one less place where you have to deal with sending emails. That’s always good. Also it means that you don’t need to store the email of the user. You may want to, but that’s your option.
I’ve always been a fan of canned authentication and authorization systems. I’ve been using them since the days of PHP 4.0 and I used them in Django and ASP.NET (MVC). But with OpenID, it seems the authentication became almost trivial. Canned solutions were always troublesome because they had to work for everybody so they implemented a lot of stuff you don’t actually need and sometimes you spend more time fighting the bureaucracy of the system than producing something.
Is it possible that without OpenID authentication and identity for the developer of a web site becomes something simple and trivial? Where rolling your own solution not only is simple enough, but also the way to go. I’m looking forward to my users being just in the user table, and not all over the place in users, profile, membership, etc. I’m giving the roll-your-own-with-OpenID a try. I hope to post positively about it soon.