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Uh oh, looks like in all the Web 2.0 excitement, somebody forgot about security. Ajax applications may be exposing enterprises to a new series of security threats.
Ajax uses web services techniques to transmit information directly from a database to the website. In a non-Ajax application, the same application would have required a web server to build the actual webpage that is presented to the user. But an Ajax application combines disparate data sources directly on the client system.