Public and private communication with a quantum channel and a secret key

Details Public and private communication with a quantum channel and a secret key Public and private communication with a quantum channel and a secret key

2009-03-23

arxiv.org/abs/0903.3920v1

Physical Review A 80, 022306 (2009)

Physics

Quantum Physics

15 pages, 2 figures

Scientific paper

10.1103/PhysRevA.80.022306

We consider using a secret key and a noisy quantum channel to generate noiseless public communication and noiseless private communication. The optimal protocol for this setting is the publicly-enhanced private father protocol. This protocol exploits random coding techniques and "piggybacking" of public information along with secret-key-assisted private codes. The publicly-enhanced private father protocol is a generalization of the secret-key-assisted protocol of Hsieh, Luo, and Brun and a generelization of a protocol for simultaneous communication of public and private information suggested by Devetak and Shor.

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