https://github.com/papafe/stegan

A simple stegranography application for hiding messages inside images
https://github.com/papafe/stegan

Last synced: about 1 month ago
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A simple stegranography application for hiding messages inside images

• Host: GitHub
• URL: https://github.com/papafe/stegan
• Owner: papafe
• License: mit
• Created: 2013-09-25T09:32:28.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2013-09-25T10:37:31.000Z (over 11 years ago)
• Last Synced: 2024-12-09T20:06:28.910Z (about 2 months ago)
• Language: Python
• Size: 113 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
stegan

======

A simple stegranography application for hiding messages inside images

    This program encrypts and decrypts a message inside an

    image using steganography.

    Use --help or -h for details on usage

    

    In encrypt mode:

        The message is transformed in a sequence of bits, preceded by a

        fixed length 16 bits sequence that represents the length of the

        message to be hidden.

        The bit sequence is then encoded in the least significant bits

        of the blue component of the image. The image is then stored

        in the same folder, using the name of the original file preceded by

        "encrypted_".

        As the length of the message has to be encoded in 16 bits, only 

        messages that can be encoded in 2^16=65536 bits are allowed

        

    In decrypt mode:

        The list of all the least significant bits of the blue component of

        the given image is considered.

        Then the first 16 bits are interpreted as the lenght of the following

        hidden message.

        Then, the hidden message is shown to screen

        N.B. the program is not robust to decryption of images that have 

        not been built with this program