Journal
EUROPEAN PHYSICAL JOURNAL D
Volume 48, Issue 2, Pages 279-284Publisher
SPRINGER
DOI: 10.1140/epjd/e2008-00075-5
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We present an efficient and economic scheme for five-party quantum state sharing of an arbitrary m-qubit state with 2m three-particle Greenberger-Horne-Zeilinger (GHZ) states and three-particle GHZ-state measurements. It is more convenient than other schemes as it only resorts to three-particle GHZ states and three-particle joint measurement, not five-particle entanglements and five-particle joint measurements. Moreover, this symmetric scheme is in principle secure even though the number of the dishonest agents is more than one. Its total efficiency approaches the maximal value.
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