Journal
OPTICS COMMUNICATIONS
Volume 282, Issue 19, Pages 4017-4019Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2009.06.061
Keywords
Deterministic secure quantum communication; Entanglement swapping; Cryptanalysis; Quantum cryptography
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Funding
- NSFC [60873191, 60821001]
- SRFDP [200800131016]
- Beijing Nova Program [20081351]
- Key Project of Chinese Ministry of Education [109014]
- Beijing Natural Science Foundation [4072020]
- National Laboratory for Modern Communications Science Foundation of China [9140C1101010601]
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The security of a deterministic secure quantum communication using four-particle genuine entangled state and entanglement swapping [X.M. Xiu, H.K. Dong, L Dong, Y.J. Cao, F. Chi, Opt. Commun. 282 (2009) 24571 is analyzed. It is shown that an eavesdropper can entangle an ancilla without introducing any error in the security test utilizing a speciality of the four-particle genuine entangled state. Moreover, the eavesdropper can distill a quarter of the secret information from her entangled ancilla. Finally, a simple improvement to resist this attack is proposed. (C) 2009 Elsevier B.V. All rights reserved.
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