Controlled Quantum Secret Sharing

Details Controlled Quantum Secret Sharing Controlled Quantum Secret Sharing

2005-08-24

arxiv.org/abs/quant-ph/0508181v2

Phys. Scr. 74 (2006) 459-463

Physics

Quantum Physics

6 pages, 0 figure, RevTeX4; published version with minor changes

Scientific paper

10.1088/0031-8949/74/4/009

We present a new protocol in which a secret multiqubit quantum state $\ket{\Psi}$ is shared by $n$ players and $m$ controllers, where $\ket{\Psi}$ is the encoding state of a quantum secret sharing scheme. The players may be considered as field agents responsible for carrying out a task, using the secret information encrypted in $\ket{\Psi}$, while the controllers are superiors who decide if and when the task should be carried out and who to do it. Our protocol only requires ancillary Bell states and Bell-basis measurements.

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