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OpenID Authentication by example
This document discusses OpenID, an open standard for decentralized authentication on the web. It notes some problems with traditional username and password systems like passwords being hard to manage and user databases being vulnerable to theft. OpenID provides a solution by allowing users to authenticate using a URL of their choice, like a personal domain name, rather than having separate usernames and passwords for each site. When authenticating with a new site, OpenID verifies the user's identity through their OpenID provider rather than the site directly. The document provides examples of how OpenID works and can be implemented using libraries like Net::OpenID::Consumer in Perl. It also addresses questions like how to choose an OpenID provider and maintain multiple personas.
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