arXiv subjects

Suc-Kyoung Hong

Publications and source records attributed to Suc-Kyoung Hong.

2 recordsLinked to original sources

arXiv2006

Quantum Dialogue by Using the GHZ State

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.

quant-ph↗

arXiv2006

Three-party quantum secure direct communication based on Greenberger-Horne-Zeilinger states

We present a three-party simultaneous quantum secure direct communication (QSDC) scheme by using Greenberger-Horne-Zeilinger (GHZ) states. This scheme can be directly generalized to $N$-party QSDC by using $n$-particle GHZ states. We show that the many-party simultaneous QSDC scheme is secure not only against the intercept-and-resend attack but also against the disturbance attack.

quant-ph↗