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stegpy

A program for encoding information in image and audio files through steganography.

On the left, a house with a steganographically hidden image. On the right, the extracted hidden image of a cat. It is revealed by removing all but the last significant bit of each color component in the host image.

Supported host formats:

  • PNG
  • BMP
  • WAV

Images in a different format are automatically converted to PNG. Different audio formats are not supported at all.

Dependencies:

  • numpy
  • cryptography
  • Pillow (PIL fork)
$ pip install -r  requirements.txt

How to use:

  • Hide a message:
$ python3 steg.py "Hello World!" image.png
  • Hide a file:
$ python3 steg.py file.whatever image.png
  • Encrypt:
$ python3 steg.py "Hello World!" image.png -p
Enter password (will not be echoed):
Verify password (will not be echoed):
$ python3 steg.py _image.png -p
Enter password (will not be echoed):
Hello World!

To do:

  • Add docstrings
  • Allow encoding across multiple files
  • Use a proper header separator for audios
  • Fix first pixel
  • Support GIF, JPEG, FLAC as host