Steganography is technique of hiding one file (e.g secret.txt) to another file (eg catpicture.jpg). Example in Linux terminal which directory is in folder where is your catpicture.jpg:
1. echo "Very secret text" > secret.txt
2. 7z a secret.7z secret.txt
3. cat secret.7z > catpicture.jpg
And thats it, to be sure that there is secret.txt in your catpicture.jpg just move catpicture to other folder cd into that folder and type:
4. 7z x catpicture.jpg
You should see your secret.txt file.
Follow
You can put any archive in picture, just be sure that 700x700 pixels catpicture.jpg isn't 50GB heavy, that might be little bit suspicious.
