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If you take some "random" data which could be either image data or part of a program, and the create a header for a JPEG file which would hold the exact information to go with the data it would show in an image viewer as a bunch of garbage, but it has all signs of an image. I don't think a PERL script would be able to detect such a file. Maybe it's an idea for one of the free host operators to post one of those JPEGS here so people can have a go at it. I think we all want to get down cheaters
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