Stega

Stega is a simple steganography_ tool that allows you to losslessly embed messages into images. The image that comes back is same as the original.

The only requirement is that you use a lossless image format, so no jpeg images will work.

This implementation was adapted from a paper_ titled "Lossless Data Hiding in the Spatial Domain for High Quality Images", written by Hong Lin Jin, Masaaki Fujiyoshi, and Hitoshi Kiya

.. _paper: http://203.64.187.41/htdocs-41/em/771.pdf .. _steganography: http://en.wikipedia.org/wiki/Steganography

Usage::

image = Image.new('RGB', (111, 111))
msg = "What hath God wrought. "
s = Stega(image)
s.add_message(msg)

im, message = s.extract()
assert message == msg

Run tests::

$ ./runtests