Welcome to Stéganô’s documentation!

Stéganô is a Python steganography module. Steganography is the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message, a form of security through obscurity. Consequently, functions provided by Stéganô only hide message, without encryption. Indeed steganography is often used with cryptography.

The advantage of steganography, over cryptography alone, is that messages do not attract attention to themselves. If you are interested in cryptography have a look at my project pySecret.

Download Stéganô

You can clone the source code of Stéganô :

$ hg clone https://bitbucket.org/cedricbonhomme/stegano/

More information about how to install Stéganô in the tutorial.


  • Python >= 3.2 (tested with Python 3.3.1);
  • Pillow (friendly fork of Python Imaging Library).

Methods of hiding

For the moment, Stéganô implements these methods of hiding:

  • using the red portion of a pixel to hide ASCII messages;
  • using the Least Significant Bit (LSB) technique;
  • using the LSB technique with sets based on generators (Sieve for Eratosthenes, Fermat, Mersenne numbers, etc.);
  • using the description field of the image (JPEG).

Moreover some methods of steganalysis are provided:

  • steganalysis of LSB encoding in color images;
  • statistical steganalysis.


More information available at the tutorial page


Stéganô is under GPL v3 license.


If you wish and if you like Stéganô, you can donate via bitcoin. My bitcoin address: 1GVmhR9fbBeEh7rP1qNq76jWArDdDQ3otZ


My home page

Indices and tables