openid.sys.kth.se is an OpenID provider for members of the KTH community
OpenID is a distributed authentication system for the web. Using a single OpenID, you can securely sign on to any website that supports OpenID, without ever having to give them a password or even create an account. openid.sys.kth.se gives registered KTH users an OpenID identity.
Go to any website that supports OpenID. (e.g. Livejournal or Doxory) Enter http://openid.sys.kth.se/your_username_here into the OpenID login box. You should be brought to the usual KTH login page (unless you are already logged in). When you have authenticated yourself to the KTH system the other site will know your identity.