document: Supporting global user profiles through trusted authorities Personalization generally refers to making a Web site more responsive to the unique and individual needs of each user . We argue that for personalization to work effectively , detailed and interoperable user profiles should be globally available for authorized sites , and these profiles should dynamically reflect changes in user interests . Creating user profiles from user click-stream data seems to be an effective way of generating detailed and dynamic user profiles . However , a user profile generated in this way is available only on the computer where the user accesses his browser , and is inaccessible when the same user works on a different computer . On the other hand , integration of the Internet with telecommunication networks has made it possible for the users to connect to the Web with a variety of mobile devices as well as desktops . This requires that user profiles should be available to any desktop or mobile device on the Internet that users choose to work with . In this paper , we address these problems through the concept of `` trusted authority '' . A user agent at the client side that captures the user click stream , dynamically generates a navigational history ` log ' file in Extensible Markup Language -LRB- XML -RRB- . This log file is then used to produce ` user profiles ' in a resource description framework -LRB- RDF -RRB- . A user 's right to privacy is provided through the Platform for Privacy Preferences -LRB- P3P -RRB- standard . User profiles are uploaded to the trusted authority and served next time the user connects to the Web
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