jtallar / shared-secret

Stenography shared secret implementation coded in C distributing and recovering .bmp images from shadows.

Shared Secret with Stenography

Compiling the files

Inside the stenography-shared-secret folder run:

make 

This will create an executable file called ss.

Executing program

File must be run using

./ss (d|r) secret-file.bmp k shadows-directory/

If there's an error when executing, an error message will be shown and the code will return EXIT_FAILURE. If successful, nothing is shown and the code will return EXIT_SUCCESS.

Distributing an image

Let's say we want to distribute the image Albert.bmp to all the shadow images in files/ and setting a k of 5:

./ss d /path/to/Albert.bmp 5 /path/to/files/   

Recovering an image

Let's say we want to recover the secret image from the shadow images in files/ with a k of 5:

./ss r /path/to/save/secret.bmp 5 /path/to/files/