VoIP Steganography

• A few previous research efforts

• Uses of “steganography”:

• • Using redundant bits to widen RTP audio band
  • Using redundant bits for error correction
  • Replacing RTCP
  • Watermarking audio for integrity checking

• Deficiencies:

• • Some are just “theory” papers, don’t explain how they intend to accomplish certain tasks
  • Don’t achieve the primary goal of steganography:
  • • Use of steganographic techniques easily identifiable by an observer
    • Message data is trivially recognized and extracted from stego-medium
  • Only one public PoC; no full implementations

• Analysis paper forthcoming