Quantum Dialogue by Using the GHZ State

Details Quantum Dialogue by Using the GHZ State Quantum Dialogue by Using the GHZ State

2006-01-19

arxiv.org/abs/quant-ph/0601127v1

Journal of the Korean Physical Society, 48, 1 (2006) 24-27

Physics

Quantum Physics

Scientific paper

We present a quantum dialogue protocol by using the Greenberger-Horne-Zeilinger (GHZ) state. In this paper, we point out that the `quantum dialogue' communication scheme recently introduced by Nguyen can be eavesdropped on under an intercept-and-resend attack. We also give a revised control mode to detect this attack. Hence, within the present version two users can exchange their secret messages securely and simultaneously, and the efficiency of information transmission can be successfully increased.

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