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Steganography

This console application allows you to hide information in images or extract information from images. The principle of operation is to divide the image into groups of randomly selected pixels and change the least significant bits in the color components (R, G, B) of these pixels.

Usage

Required command line arguments

  1. -mode {encrypt/decrypt}
  2. -i {image name} : Supported formats - jpg, png, bmp
  3. -p {password}: Password for correct encoding/decoding
  4. -m {message}: The message to be hidden for decrypt mode (if file mode not selected)

Optional command line arguments

  1. -f {file name}: Used to save the message to a file if the encoding mode is selected or to read the message from the file if the decoding mode is selected. You can write only -f then the default names will be used (ouput.txt, input.txt)

Examples

Tiger image

Decrypting

test -mode decrypt -i tiger.bmp -p 123 -m "Message"

Encrypting

test -mode encrypt -i tiger.bmp -p 123
Encrypted message: Message

Errors

  1. Password is incorrect 
    test -mode encrypt -i tiger.bmp -p 321
Password is incorrect!
  2. Cant load image 
    test -mode encrypt -i tihger.bmp -p 123  
Cant load image!
  3. Mode not selected 
    test -mode -i tiger.bmp -p 123          
Error: Mode is not selected!
  4. Unknown mode 
    test -mode f -i tiger.bmp -p 123 
Error: Unknown mode!