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Submission + - Hide secret messages in images on the internet

Andrew Lee writes: "This program lets you hide arbitrary text messages inside image files. It is different than other stego tools in that it encodes the message by making visible changes to the image, rather than encoding the message in non-visible parts of an image file's data. In theory you can even print out the image and scan it back in to retrieve the secret message."

Some programming languages manage to absorb change, but withstand progress. -- Epigrams in Programming, ACM SIGPLAN Sept. 1982