Quantum simultaneous secret distribution with dense coding by using cluster states
Quantum Information Processing
A multiparty error-correcting method for quantum secret sharing
Quantum Information Processing
One-insider attack of quantum secret sharing protocol with collective eavesdropping-check
Quantum Information Processing
Quantum Information Processing
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We propose a (t, m)驴(s, n) threshold quantum secret sharing protocol between multiparty (m members in group 1) and multiparty (n members in group 2) using a sequence of Greenberger---Horne---Zeilinger (GHZ) states, which is useful and efficient when the parties of communication are not all present. In the protocol, Alice prepares a sequence of GHZ states in one of the eight different states and sends the last two particles to the first agent while other members encode their information on the sequence via unitary transformations. Finally the last member in group 2 measures the qubits. It is shown that this scheme is safe.