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Steganography, of course, embeds messages in images, generally. But there are examples of people embedding executable code. Here's a perl script: http://www.perlmonks.org/?node_id=443504 Jack On Mar 17, 2014, at 3:13 PM, Andreas Broeckmann <[log in to unmask]> wrote: > folks, > > I'm not sure how relevant the question is, but are there instances of *images* performing as software code? > > there are QR-codes, but they are encodings/encryptions of text files which are then treated as data to be processed by software. > > regards, > -a