Quantum secret sharing between multiparty and multiparty without entanglement
- 7 July 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 72 (1), 012304
- https://doi.org/10.1103/physreva.72.012304
Abstract
We propose a quantum secret sharing protocol between multiparty ( members in group 1) and multiparty ( members in group 2) using a sequence of single photons. These single photons are used directly to encode classical information in a quantum secret sharing process. In this protocol, all members in group 1 directly encode their respective keys on the states of single photons via unitary operations; then, the last one (the member of group 1) sends of the resulting qubits to each of group 2. Thus the secret message shared by all members of group 1 is shared by all members of group 2 in such a way that no subset of each group is efficient to read the secret message, but the entire set (not only group 1 but also group 2) is. We also show that it is unconditionally secure. This protocol is feasible with present-day techniques.
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