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