Large payload quantum steganography based on cavity quantum electrodynamics

TL;DR

This paper introduces a cavity QED-based quantum steganography protocol that enables large payload secret communication with high security, imperceptibility, and a capacity of five bits, outperforming previous methods.

Contribution

It presents a novel cavity QED protocol for quantum steganography that achieves larger payload capacity and enhanced security features compared to prior protocols.

Findings

Capacity of five bits per transmission

Insensitive to cavity decay and thermal fields

High security and imperceptibility

Abstract

A large payload quantum steganography protocol based on cavity quantum electrodynamics (QED) is presented in the paper, which effectively uses the evolution law of atom in cavity QED. The protocol builds up hidden channel to transmit secret messages using entanglement swapping between one GHZ state and one Bell state in cavity QED together with the Hadamard operation. The quantum steganography protocol is insensitive to cavity decay and thermal field. The capacity, imperceptibility and security against eavesdropping are analyzed in detail in the protocol. It turns out that the protocol not only has good imperceptibility but also possesses good security against eavesdropping. In addition, its capacity of hidden channel achieves five bits, larger than most of those previous quantum steganography protocols.