OpenID is an open SSO-architecture for external sites that makes it unnecessary for site owners to implement their own Identity Management solution. It works pretty much like Microsoft Live (formerly Passport), but with the significant difference that with OpenID there are many "publishers" of login accounts. Any site can start issueing OpenID accounts. For instance, Yahoo announced recently that they are joining the party adding their 248 millions of users to the crowd enabling them to instantly log into all other sites using OpenID. Microsoft and Google has announced that they are backing OpenID, and it appears OpenID has the potantial of becoming the de facto standard for internet SSO during 2008.
Wanna try it out? There is an excellent step-by-step guide at:
http://www.plaxo.com/api/openid_recipe. At http://blog.tomaselfving.com/2007/12/openid-20-released.html there is an list of libraries with APIs encapsulating the OpenID APIs making the implementation even easier.
© Copyright 2007, Tomas Elfving
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