Multiparty Quantum Remote Secret Conference

Abstract

We present two schemes for multiparty quantum remote secret conference in which each legitimate conferee can read out securely the secret message announced by another one, but a vicious eavesdropper can get nothing about it. The first one is based on the same key shared efficiently and securely by all the parties with Greenberger-Horne-Zeilinger (GHZ) states, and each conferee sends his secret message to the others with one-time pad crypto-system. The other one is based on quantum encryption with a quantum key, a sequence of GHZ states shared among all the conferees and used repeatedly after confirming their security. Both these schemes are optimal as their intrinsic efficiency for qubits approaches the maximal value.

4 pages, 1 figure

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Cited by in corpus (5)

• Controlled Teleportation of an Arbitrary Multi-Qudit State in a General Form with d-Dimensional Greenberger-Horne-Zeilinger States
• Multiparty quantum secret sharing with pure entangled states and decoy photons
• Fault tolerant channel-encrypting quantum dialogue against collective noise
• Economical Quantum Secure Direct Communication Network with Single Photons
• Quantum Conference