What is an OpenID
OpenID is an URL
OpenID eliminates the need for multiple usernames across different websites, simplifying your online experience.
It means OpenID is an open, decentralized standard for user authentication and access control, allowing users to log onto many services with the same digital identity. It is a Single sign-on (SSO) method of access control. As such, it replaces the common login process that uses a login-name and a password, by allowing a user to log in once and gain access to the resources of multiple software systems.
You get to choose the OpenID Provider that best meets your needs and most importantly that you trust. At the same time, your OpenID can stay with you, no matter which Provider you move to. And best of all, the OpenID technology is not proprietary and is completely free.
How can I use this
OpenID is still in the adoption phase and is becoming more and more popular, as large organizations like AOL, Microsoft, Sun, Novell, etc. begin to accept and provide OpenIDs. Today it is estimated that there are over 160-million OpenID enabled URIs with nearly ten-thousand sites supporting OpenID logins.
More sites:
Here are some places you can visit to see where you can use your OpenID to log in today:
You can use your OpenID on any one of a growing number of sites (nearly ten-thousand) which support OpenID. If one of your favorite sites doesn’t support OpenID yet, ask them when they will!
Where can I get that
If you don’t have an OpenID yet, here are a few which are generally recommended by various members of the community. In the end you should choose a Provider from a company which you trust. We realize this list isn’t perfect and plan to evolve it into a more useful tool. If you’re curious about the technology behind various providers, you can look at a guide comparing provider feature sets.
Providers
ClaimID
claimID is the free, easy way to manage your online identity with OpenID.
myOpenID
Secure, free, hosted OpenID server by JanRain.
VeriSign’s Personal Identity Provider
Free OpenID Provider with support for multi-factor authentication.
myID.net
Free OpenID Provider with support for groups and Korean language.
myVidoop
Free OpenID Provider that eliminates passwords with security features, customization, and browser integration.
check more providers here
For a list of more OpenID Providers, you may with to check the OpenID Directory. We don’t make any guarantees about the providers listed nor do we maintain this list.
OpenID authentication is used and provided by several large websites. Organizations like AOL, BBC, Google,IBM, Microsoft,MySpace, Orange, PayPal, VeriSign, and Yahoo! act as providers
AOL- openid.aol.com/screenname
Blogger
- blogname.blogspot.com
- Flickr
- www.flickr.com/photos/username
LiveDoor
- profile.livedoor.com/username
LiveJournal
- username.livejournal.com
Orange (France Telecom)
- http://openid.orange.fr/
SmugMug- username.smugmug.com
- Technorati
- technorati.com/people/technorati/username
Vox- member.vox.com
Yahoo
- http://openid.yahoo.com
WordPress.com- username.wordpress.com
For developers
OpenID is an open, decentralized, free framework for user-centric digital identity. OpenID takes advantage of already existing internet technology (URI, HTTP, SSL, Diffie-Hellman) and realizes that people are already creating identities for themselves whether it be at their blog, photostream, profile page, etc. With OpenID you can easily transform one of these existing URIs into an account which can be used at sites which support OpenID logins.
More Details check this
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