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A small example package

Project description


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
  • GIF
  • WebP
  • WAV

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


  • numpy
  • cryptography
  • Pillow (PIL fork)


$ pip3 install stegpy

How to use:

  • Hide a message or file:
$ stegpy "Hello World!" image.png
  • Extract it:
$ stegpy _image.png
  • Encrypt:
$ stegpy "Hello World!" image.png -p
Enter password (will not be echoed):
Verify password (will not be echoed):
$ stegpy _image.png -p
Enter password (will not be echoed):
Hello World!
  • More options:
$ stegpy -h

To do:

  • Add docstrings
  • Allow encoding across multiple files
  • Support JPEG & FLAC as hosts

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