Quantum Steganography

Understand

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.