期刊
CHINESE PHYSICS B
卷 24, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/24/5/050306
关键词
quantum information hiding; quantum covert channel; entanglement swapping; high-level Bell states
资金
- National Natural Science Foundation of China [61303199, 61272514, 61170272, 61121061, 61411146001]
- Shandong Provincial Natural Science Foundation of China [ZR2013FM025, ZR2013FQ001, ZR2014FM003]
- Shandong Provincial Outstanding Research Award Fund for Young Scientists of China [BS2013DX010, BS2014DX007]
- Program for New Century Excellent Talents in Universities, China [NCET-13-0681]
- National Development Foundation for Cryptological Research, China [MMJJ201401012]
- Fok Ying Tong Education Foundation, China [131067]
- Shandong Academy of Sciences Youth Fund Project, China [2013QN007]
Using entanglement swapping of high-level Bell states, we first derive a covert layer between the secret message and the possible output results of the entanglement swapping between any two generalized Bell states, and then propose a novel high-efficiency quantum information hiding protocol based on the covert layer. In the proposed scheme, a covert channel can be built up under the cover of a high-level quantum secure direct communication (QSDC) channel for securely transmitting secret messages without consuming any auxiliary quantum state or any extra communication resource. It is shown that this protocol not only has a high embedding efficiency but also achieves a good imperceptibility as well as a high security.
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