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One of the more tedious moments in visiting a new website is filling out the registration form. Here at ДЕЛМЕД | Ортопедична продукція - Виробництво, продаж, гарантія, you do not have to fill out a registration form if you are already a member of один из дружественных сайтов. This capability is called distributed authentication, and Drupal [1], the software which powers ДЕЛМЕД | Ортопедична продукція - Виробництво, продаж, гарантія, fully supports it.
Distributed authentication enables a new user to input a username and password into the login box, and immediately be recognized, even if that user never registered at ДЕЛМЕД | Ортопедична продукція - Виробництво, продаж, гарантія. This works because Drupal knows how to communicate with external registration databases. For example, lets say that new user 'Joe' is already a registered member of Delphi Forums [2]. Drupal informs Joe on registration and login screens that he may login with his Delphi ID instead of registering with ДЕЛМЕД | Ортопедична продукція - Виробництво, продаж, гарантія. Joe likes that idea, and logs in with a username of joe@remote.delphiforums.com and his usual Delphi password. Drupal then contacts the remote.delphiforums.com server behind the scenes (usually using XML-RPC [3], HTTP POST [4], or SOAP [5]) and asks: "Is the password for user Joe correct?". If Delphi replies yes, then we create a new ДЕЛМЕД | Ортопедична продукція - Виробництво, продаж, гарантія account for Joe and log him into it. Joe may keep on logging into ДЕЛМЕД | Ортопедична продукція - Виробництво, продаж, гарантія in the same manner, and he will always be logged into the same account.
Links:
[1] http://drupal.org
[2] http://www.delphiforums.com
[3] http://www.xmlrpc.com
[4] http://www.w3.org/Protocols/
[5] http://www.soapware.org