Quantum broadcast communication

Details Quantum broadcast communication Quantum broadcast communication

2006-04-24

arxiv.org/abs/quant-ph/0604179v3

Chin. Phys., 2007, 16 (7): 1868-1877

Physics

Quantum Physics

Scientific paper

10.1088/1009-1963/16/7/011

Broadcast encryption allows the sender to securely distribute his/her secret to a dynamically changing group of users over a broadcast channel. In this paper, we just consider a simple broadcast communication task in quantum scenario, which the central party broadcasts his secret to multi-receiver via quantum channel. We present three quantum broadcast communication schemes. The first scheme utilizes entanglement swapping and Greenberger-Horne-Zeilinger state to realize a task that the central party broadcasts his secret to a group of receivers who share a group key with him. In the second scheme, based on dense coding, the central party broadcasts the secret to multi-receiver who share each of their authentication key with him. The third scheme is a quantum broadcast communication scheme with quantum encryption, which the central party can broadcast the secret to any subset of the legal receivers.

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