Quantum Steganography

Abstract

Steganography is the process of hiding secret information by embedding it in an "innocent" message. We present protocols for hiding quantum information in a codeword of a quantum error-correcting code passing through a channel. Using either a shared classical secret key or shared entanglement the sender (Alice) disguises her information as errors in the channel. The receiver (Bob) can retrieve the hidden information, but an eavesdropper (Eve) with the power to monitor the channel, but without the secret key, cannot distinguish the message from channel noise. We analyze how difficult it is for Eve to detect the presence of secret messages, and estimate rates of steganographic communication and secret key consumption for certain protocols.

10 pages paper (double spaced) + 12 pages supporting material, including 3 figures

Cited by in corpus (12)

• Covert Optical Communication
• Covert Quantum Communication
• A framework for covert and secret key expansion over quantum channels
• Quantum cryptography beyond key distribution: theory and experiment
• Quantum Steganography over Noisy Channels: Achievability and Bounds
• Quantum Steganography over Noiseless Channels: Achievability and Bounds
• Absolutely covert quantum communication
• Quantum Steganography via Coherent and Fock State Encoding in an Optical Medium
• Hide and seek with quantum resources: New and modified protocols for quantum steganography
• Ultrabroadband, ultranarrowband and ultrapassband composite polarisation half-wave plates, ultrabroadband composite polarisation pi-rotators and on the quantum-classical analogy
• High Fidelity Artificial Quantum Thermal State Generation using Encoded Coherent States
• Quantum steganographic protocols using degenerate and entanglement-assisted quantum codes