Yahoo!, Flickr, OpenID and Identity Projection
Simon Willison,
Weblog,
Jan 08, 2008
It looks like Yahoo! and Flickr are preparing to support OpenID. "OpenID is good for more than just authentication. The OpenID protocol allows a user to assert ownership of a URL. This can be used for SSO-style authentication, but it can also be used to prove ownership of a specific account to some other service, a concept I've been calling identity projection."
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