August 2014
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37 Reads
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79 Citations
Quantum Information Processing
This work proposes a new dynamic quantum secret sharing (DQSS) protocol using the measurement property of Greenberger–Horne–Zeilinger state and the controlled-NOT gate. In the proposed DQSS protocol, an agent can obtain a shadow of the secret key by simply performing a measurement on single photons. In comparison with the existing DQSS protocols, it provides better qubit efficiency and has an easy way to add a new agent. The proposed protocol is also free from the eavesdropping attack, the collusion attack, and can have an honesty check on a revoked agent.