Getting Stéganô

$ hg clone https://bitbucket.org/cedricbonhomme/stegano
$ cd stegano/
$ chmod u+x *.py # if you want to use Stéganô in command line

Installation

$ python setup.py install

Now you will be able to use Stéganô in your Python program.

Using Stéganô as a Python module

Python 2.7 (r27:82500, Jul  5 2010, 10:14:47)
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from stegano import slsb
>>> secret = slsb.hide("./pictures/Lenna.png", "Hello world!")
>>> secret.save("./Lenna-secret.png")
>>> slsb.reveal("./Lenna-secret.png")
Hello world!

Using Stéganô in command line for your scripts

Display help

$ ./slsb.py --help
Usage: slsb.py [options]

Options:
--version             show program's version number and exit
-h, --help            show this help message and exit
--hide                Hides a message in an image.
--reveal              Reveals the message hided in an image.
-i INPUT_IMAGE_FILE, --input=INPUT_IMAGE_FILE
                        Input image file.
-o OUTPUT_IMAGE_FILE, --output=OUTPUT_IMAGE_FILE
                        Output image containing the secret.
-m SECRET_MESSAGE, --secret-message=SECRET_MESSAGE
                        Your secret message to hide (non binary).
-f SECRET_FILE, --secret-file=SECRET_FILE
                        Your secret to hide (Text or any binary file).
-b SECRET_BINARY, --binary=SECRET_BINARY
                        Output for the binary secret (Text or any binary
                        file).

Hide and reveal a text message

$ ./slsb.py --hide -i ./pictures/Lenna.png -o ./pictures/Lenna_enc.png -m HelloWorld!
$ ./slsb.py --reveal -i ./pictures/Lenna_enc.png
HelloWorld!

Hide and reveal a binary file

$ wget http://www.gnu.org/music/free-software-song.ogg
$ ./slsb.py --hide -i ./pictures/Montenach.png -o ./pictures/Montenach_enc.png -f ./free-software-song.ogg
$ rm free-software-song.ogg
$ ./slsb.py --reveal -i ./pictures/Montenach_enc.png -b ./song.ogg

Hide and reveal a message by using the description field of the image

$ ./exif-header.py --hide -i ./Elisha-Cuthbert.jpg -o ./Elisha-Cuthbert_enc.jpg -f ./fileToHide.txt
$ ./exif-header.py --reveal -i ./Elisha-Cuthbert_enc.jpg

Steganalysis

$ ./steganalysis-parity.py -i ./pictures./Lenna_enc.png -o ./pictures/Lenna_enc_st.png