期刊
CHINESE PHYSICS B
卷 22, 期 4, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1056/22/4/040305
关键词
quantum steganography; hidden capacity; entanglement swapping; Hadamard operation; cavity QED
资金
- National Natural Science Foundation of China [60972071]
- Natural Science Foundation of Zhejiang Province, China [LQ12F02012, Y6100421]
A large payload quantum steganography protocol based on cavity quantum electrodynamics ( QED) is presented in this paper, which effectively uses the evolutionary law of atoms in cavity QED. The protocol builds up a 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 the 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 for a hidden channel achieves five bits, larger than most of the previous quantum steganography protocols.
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