Quantum secret sharing between multiparty and multiparty without entanglement
- College of Physics, Hebei Normal University, Shijiazhuang 050016 (China)
- CCAST (World Laboratory), P.O. Box 8730, Beijing 100080 (China)
We propose a quantum secret sharing protocol between multiparty (m members in group 1) and multiparty (n 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 mth member of group 1) sends 1/n 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.
- OSTI ID:
- 20718312
- Journal Information:
- Physical Review. A, Vol. 72, Issue 1; Other Information: DOI: 10.1103/PhysRevA.72.012304; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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