QUICK INFO:

• To embed a file inside a picture:

  • steghide embed -cf picture.jpg -ef file.txt

• To extract a file hidden inside a picture:

  • steghide extract -sf picture.jpg

• Formats of media compatible with steghide:

  • .bmp (Windows bitmap)

  • .jpeg (JFIF format)

  • .png (Portable Network Graphics)

  • .wav (Waveform Audio File Format)

  • .au (NeXT/Sun audio)

• More info on steghide:

  • man steghide