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How Gifshuffle Works
This document gives a description of the encoding scheme used by gifshuffle. Steganography is the science of concealing messages in a covering medium.
Unfortunately, sending large amounts of raw audio and image data can arouse suspicion, and the pseudo-English encoding schemes are not sophisticated enough to fool a human observer. The encoding scheme used by gifshuffle relies on the fact that the ordering of the colours in the colourmap of a GIF does not affect the way an image is displayed. This was chosen because the colourmap encoding scheme provides very limited storage space in some situations, and a compression algorithm with low overhead was needed.
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