439 citations · 490 across the 11 of their papers we have counts for
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Eavesdropping on the "ping-pong" type quantum communication protocols with invisible photon
Qing-yu Cai
The crucial issue of quantum communication protocol is its security. In this paper, we show that all the deterministic and direct two-way quantum communication protocols, sometimes…
Photon-number-solving Decoy State Quantum Key Distribution
Qing-yu Cai, Yong-gang Tan
In this paper, a photon-number-resolving decoy state quantum key distribution scheme is presented based on recent experimental advancements. A new upper bound on the fraction of co…
Optimal Experimental Scheme for Bennett-Brassard 1984 Quantum Key Distribution Protocol with Weak Coherent Sources, Noisy and Lossy Channel
Qing-yu Cai
It is the first scheme which allows the detection apparatus to achieve both the photon number of arriving signals and quantum bit error rate of the multiphoton pulses precisely. We…
Comment on 'quantum dialogue'
Qing-yu Cai
In this comment, we want to emphasize that when the state of the two qubit is or , Bob's Bell basis measurement outcome can not be . Als…
Eavesdropping on the Bostroem-Filbinger Communication Protocol in Noisy Quantum Channel
Qing-yu Cai
We show an eavesdropping scheme on Bostr\UNICODE{0xf6}m-Felbinger communication protocol (called ping-pong protocol) [Phys. Rev. Lett. 89, 187902 (2002)] in an ideal quantum channe…
N-Partner Secure Direct Communication Based on Quantum Nonlocality
LV Hua, Qing-Yu Cai
A multipartner secure direct communication protocol is presented, using quantum nonlocality. Security of this protocol is based on `High fidelity implies low entropy'. When the ent…