Stegnography ( Steghide )
  = apt-get install steghide // installation command   = steghide // help   = steghide embed -cf image.jpg -ef file.txt   = enter passphrase // for security   = extract   = steghide extract -sf image.jpg   =enter password   * STEGNOGRAPHY STEGHIDE *             Steganography is data hidden within data. Stegano+  graphy is an encryption technique that can be used along with cryptography as an extra-secure method in which to protect data. Steganography techniques can be applied to images, a video file or an audio file.            Steganography is the art of covered or hidden writing. The purpose of steganography is covert communication to hide a message from a third party. ... In ancient times, messages were hidden on the back of wax writing tables, written on the stomachs of rabbits, or tattooed on the scalp of slaves