Yahoo!, Flickr, OpenID and Identity Projection - simonwilliso...
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Saved by 4 people (1 private), first by anonymouse user on 2008-04-08
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The URL of the server is interesting as well: it suggests that Yahoo!’s OpenID support is designed from the start to apply to more than just Flickr. I wouldn’t be at all surprised to see similar links start to crop up on all kinds of other Yahoo! properties—anything that has a page which can be considered to represent a user account. This would make a lot of sense, because OpenID is good for more than just authentication.
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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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If users can easily project their Flickr, Upcoming or del.icio.us identities to other sites, developers can start to build all kinds of neat things.
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A common misconception about OpenID is that it’s only really useful if users stick to using one identity.
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so that I can selectively cross-pollinate some of my profiles to new services
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short version is that you’ll be able to enter “me.yahoo.com” in to an OpenID field on a site and have Yahoo! pick an obfuscated, unique OpenID for your interactions with that site
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This protects your privacy by preventing anyone from outside of Yahoo! from correlating your behaviour across multiple OpenID-enabled services
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