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Chapter 17. Understanding Security > About compatibility with previous Flash Pl...

About compatibility with previous Flash Player security models

As a result of the security feature changes in Flash Player 7, content that runs as expected in Flash Player 6 or earlier might not run as expected in later versions of Flash Player. For example, in Flash Player 6, a SWF file that resides in www.macromedia.com could read data on a server located at data.macromedia.com; that is, Flash Player 6 allowed a SWF file from one domain to load data from a similar domain.

In Flash Player 7 and later, if a version 6 (or earlier) SWF file attempts to load data from a server that resides in another domain, and that server doesn’t provide a policy file that allows reading from that SWF file’s domain, the Macromedia Flash Player Settings dialog box appears. The dialog box asks the user to allow or deny the cross-domain data access.


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