flash cross domain interaction.

When an attempt is made to load content into a SWF file at runtime, the request is subject to the Flash Player security model, which is in place to protect users and website owners. As part of this model, Flash Player by default prevents cross-domain loading of data, but allows cross-domain sending of data.
in stack overflow, it says : This is a security measure in Flash. You can configure your remote server to accept these requests, however, by including a file called crossdomain.xml in your server's HTML root. The file should look something like this:


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