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Journal of Information Science and Engineering, Vol. 28 No. 3, pp. 471-478 (May 2012)

On the "Deterministic Secure Quantum Communication using Four-Particle Entangled State and Entanglement Swapping"*

Department of Computer Science and Information Engineering
National Cheng Kung University
Tainan, 701 Taiwan

Recently, Xiu et al. proposed a deterministic secure quantum communication (DSQC) protocol using the entanglement swapping of four-particle genuine entangled states. Later, Qin et al. showed a double-CNOT attack on the protocol and also provided an improvement to avoid the attack. This work tries to use a batch of decoy single photons prepared randomly in one of four different states, to enhance the qubit efficiency on their DSQC protocols and avoid the double-CNOT attack at the same time.

Keywords: deterministic secure quantum communication, entanglement swapping, Qubit efficiency, double-CNOT attack, decoy photon

Full Text () Retrieve PDF document (201205_03.pdf)

Received October 1, 2010; accepted January 18, 2011.
Communicated by Sy-Yen Kuo.
* This work was supported by the National Science Council of Taiwan, under Contract No. NSC 98-2221-E-006- 097-MY3.