GIF Colourmap Steganography: conceal messages in GIF images
gifshuffle is used to conceal messages in GIF images by shuffling the colourmap, which leaves the image visibly unchanged. gifshuffle works with all GIF images, including those with transparency and animation, and in addition provides compression and encryption of the concealed message.
gifshuffle is used to conceal messages in GIF images by shuffling the colourmap, which leaves the image visibly unchanged. gifshuffle works with all GIF images, including those with transparency and animation, and in addition provides compression and encryption of the concealed message.
To install gifshuffle, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install gifshuffle
To see what files were installed by gifshuffle, run:
port contents gifshuffle
To later upgrade gifshuffle, run:
sudo port selfupdate && sudo port upgrade gifshuffle
Reporting an issue on MacPorts Trac
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Though anyone may search Trac for tickets, you must have a GitHub account in order to login to Trac to create tickets.