Have you ever thought of a single userid password so that you can access all your emails, social networks, messengers, online shops etc i.e a decentralized single sign-on system. Yeah there is a solution to this problem. It’s name is OpenID. Using OpenID-enabled sites, web users do not need to remember traditional authentication username and password. Instead, they only need to be previously registered on a website with an OpenID “identity provider” (IdP). Since OpenID is decentralized, any website can employ OpenID software as a way for users to sign in; OpenID solves the problem without relying on any centralized website to confirm digital identity.So OpenID completely eliminates the need for multiple usernames across different websites, simplifying your online experience. It is becoming more and more popular, as large organizations like AOL, Microsoft, Sun, Novell, etc. begin to accept and provide OpenIDs. Today there are over 160-million OpenID enabled URIs with nearly ten-thousand sites supporting OpenID logins.
OpenID was originally developed by Brad Fitzpatrick of LiveJournal. He is also called father of OpenID. Today, anyone can choose to be an OpenID user or an OpenID Provider for free without having to register or be approved by any organization. The OpenID Foundation was formed to help manage copyright, trademarks, marketing efforts and other activities related to the success of the OpenID community. The one and only goal of the OpenID Foundation is to protect OpenID.
If you are using any of the below services then you have OpenID
Orange (France Telecom) openid.orange.fr
If you have no OpenID then you can register on any of the above mentioned site to get OpenID. Or you can try the following sites