Steganography

Images

• StegHide
  • Extract: steghide extract -p <password> -sf <input>.jpg steghide info <image.jpg>
  • Identify: strings on file should show: 56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz

Audio

• Sonic Visualiser​ - viewing and analysing the contents of music audio files: https://www.sonicvisualiser.org/