Steganography applied to conceal small files inside a PNG image.
This script allows to conceal small files inside png images, using a well known steganographic method: hide the data in the least significant bits of an image pixels. This produces little changes to the image that usually aren't noticed by just looking at the image.
The script usage:
usage: Image_Steganography.py [-h] [-e | -d] [-i IMAGE] [-f FILE] [-o OUTPUT]
Conceal small files inside a PNG image and extract them back
optional arguments:
-h, --help show this help message and exit
-e, --encode If present the script will conceal the file in the
image and produce a new encoded image
-d, --decode If present the script will decode the concealed data
in the image and produce a new file with this data
-i IMAGE, --image IMAGE
Path to an image to use for concealing or file
extraction
-f FILE, --file FILE Path to the file to conceal or to extract
-o OUTPUT, --output OUTPUT
Path where to save the encoded image. Specify only the
file name, or use .png extension; png extension will
be added automatically
We could encode a simple txt file like file.txt:
This script is working!!!
Running the script like:
$ python3 Image_Steganography.py -e -i resources/original.png -f resources/file.txt -o resources/encoded.png
The result is an encoded image which looks identical to the original:
 |
 |
|---|---|
| Original | Encoded |
From the encoded image we can extract the concealed file:
$ python3 Image_Steganography.py -d -i resources/encoded.png -f resources/file_concealed.txt
| Software | Version | Required |
|---|---|---|
| Python | Either 2 or 3 | Yes |
| Numpy | Tested on v1.13 | Yes |
| Pillow | Tested on v4.3.0 | Yes |
| imageio | Tested on v2.2.0 | Yes |
Maybe implement a GUI.
Licensed under the term of MIT License. See attached file LICENSE.