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.

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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.

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Dependencies:

• numpy
• cryptography
• Pillow (PIL fork)

$ pip install -r requirements.txt

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How to use:

• Hide a message or file:

$ python3 steg.py "Hello World!" image.png

• Extract it:

$ python3 steg.py _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!

• More options:

$ python3 steg.py -h

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To do:

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