Improving quantum dense key distribution

Details Improving quantum dense key distribution Improving quantum dense key distribution

2004-03-30

arxiv.org/abs/quant-ph/0403220v1

Physics

Quantum Physics

Scientific paper

The capacity of the quantum dense key distribution (QDKD) [Phys. Rev. A69, 032310 (2004)] is doubled by introducing the dense coding. The security of the improved QDKD against eavesdropping is pointed out to be easily proven. In both the original QDKD and the present improved QDKD, a strategy to double the efficiency of generating the secret key with given length is proposed. In addition, we point out a leak of security of the original QDKD and fix it.

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