Steganos is a steganography library written in Clojure. The source code is available on Github at github.com/indy/Steganos

The following code embeds “some secret message” into the least significant bits of in.png, saving the result to sneaky.png

(embed-text "some secret message" "in.png" "sneaky.png" 1)

To view a message use the following:

(extract-text "sneaky.png" 1)