STEG-IT.

Steganography utility to hide messages into images (png, jpeg, bmp).

Installation.

• It's necessary to have installed the NodeJS environment. If it's not installed, go to NodeJS's web https://nodejs.org/es/. Within the environment is available the package manager npm required to install STEG-IT.
• Execute the command git clone repository_address in the folder where you wish to install STEG-IT.
• Place yourself into the folder and execute npm install to initialize the project with the required dependencies.

Usage instructions.

• First, you must place yourself into the project's folder.

• The command node stegIt-cli --help shows the general help for the application with the available options.

• Each suboption (hide to hide a message and reveal to recover it) have its individual help to see its options, for example, to see the help of hide, you have to execute the command node stegIt-cli hide --help.

  Hide message.

  • To hide a message into an image, the most basic command will be node stegIt-cli hide <path_image> that will ask for insertion of the message by keyboard.
  • It's available too the option to read the message from a file using the command node stegIt-cli hide --file <path_file> <path_image>.
  • The resulting image will be saved within the same folder of the original with "_hacked" appended at the end.
  • By default, the bits rate used (number of bits to encode by component rgb) is 4. It's possible to change it with the option --bits of hide.

  Recover message.

  • To extract a hided message from an image, it's must execute the command node stegIt-cli reveal <path_image> where path_image corresponds to the path of the image with the hided message.
  • By default, the bits rate used (number of bits to encode by component rgb) is 4. It's possible to change it with the option --bits of hide.

Credits.

This application uses external Open Source libraries. Next it's show the addresses of the libraries's code sources along with their licenses.

• Project: number-converter
  Copyright (c) 2015 Brett McLean
  License (MIT) https://github.com/brettmclean/number-converter/blob/master/LICENSE
• Project: bitwise
  Copyright (c) 2016 Florian Wendelborn
  License (MIT) https://github.com/dodekeract/bitwise/blob/master/license.md
• Project: convert-string
  Copyright 2013, JP Richardson
  License (MIT)
• Project: prompt
  Copyright (c) 2010 Nodejitsu Inc
  License (MIT) https://github.com/flatiron/prompt/blob/master/LICENSE
• Project: jimp
  Copyright (c) 2014 Oliver Moran
  License (MIT) https://github.com/oliver-moran/jimp/blob/master/LICENSE

Autor.

Ernesto Boado.