Physics – Quantum Physics
Scientific paper
2006-12-03
J. Phys. A: Math. Gen. 39 (2006) 14089-14099
Physics
Quantum Physics
7 pages, 2 figures
Scientific paper
10.1088/0305-4470/39/45/018
A circular quantum secret sharing protocol is proposed, which is useful and efficient when one of the parties of secret sharing is remote to the others who are in adjacent, especially the parties are more than three. We describe the process of this protocol and discuss its security when the quantum information carrying is polarized single photons running circularly. It will be shown that entanglement is not necessary for quantum secret sharing. Moreover, the theoretic efficiency is improved to approach 100% as almost all the instances can be used for generating the private key, and each photon can carry one bit of information without quantum storage. It is straightforwardly to utilize this topological structure to complete quantum secret sharing with multi-level two-particle entanglement in high capacity securely.
Deng Fu-Guo
Long Gui Lu
Zhou Hong-Yu
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