OPEN ID

The open ID it's the possibility of making sign in id to multiple sites, today i done some research and see that in web 2.0 sites is becoming more and more use of these single sign on system.
Major companies already done that the first that i know was Microsoft with passport but these product was not adopted. Nowadays is being carry on with Open Id foundation for some time, these technology is not proprietary it's open to the world.
These technology permits that you can log on the web sites without have to put again and again your login information.


more information on www.openid.net