History: OpenID

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            ! OpenID
''Introduced in ((Tiki2)) and removed before ((Tiki25)). Please use ((OpenID Connect)), ((SAML)) or another ((External Authentication)) method instead.''

__When you upgrade to Tiki25+, the now unusable user data related to OpenID will be deleted (The openid_url column in the users_users table)__

OpenID authentication is an open and decentralized identity system, designed "not to crumble if one company turns evil or goes out of business". 

Basically, it allows users to select a single username (and password) that can be used by any website that uses OpenID authentication.

See http://openid.net for more information.

!! To enable OpenID
* Select __Tiki and OpenID__ from tiki-admin.php?page=login -> General preferences -> Authentication method
+The ((Module login_box|Login Module)) will now include an OpenID field:
+{img src="img/wiki_up/login_module_openid.png" alt="Login module with OpenID"}

!!To use OpenID
#A user must have (or create) an OpenID. See http://openid.net/get/ for information on getting an OpenID.
#In the Tiki ((Module login_box|Login Module)), enter your OpenID.
+Tiki will attempt to validate the user's OpenID. The user will be requested to authenticate their ID with their OpenID provider.
+If you are a Google (Apps?) OpenID user, enter: 
+https://www.google.com/accounts/o8/id
+exactly like that and you'll be taken to the right place.
#Upon successful authentication, Tiki will allow you to:
**Create a new Tiki login.
**Associate an existing login with your OpenID.
+{img src="img/wiki_up/openid_valid.png" alt="Associating an OpenID with a Tiki login"}
#To create a new Tiki login, enter username and email address. 
+Tiki will register the new username and associate it with your OpenID.
+ %%%
+If you already have a Tiki login, enter your username and password in the Login area. 
+Tiki will associate the existing Tiki login with your OpenID.
+ %%%
#To login, you can now simply use your OpenID on the ((Module login_box|Login Module)).


__Note__: After associating an OpenID with a Tiki user account, you cannot ''unassociate'' the two through the Tiki Administration interface. Instead, you must edit the database, directly. In the __users_users__ table, reset the __openid_url__ for the user to ''null''.