Secure quantum cryptographic network based on quantum key distribution

Details Secure quantum cryptographic network based on quantum key distribution Secure quantum cryptographic network based on quantum key distribution

2004-03-24

arxiv.org/abs/quant-ph/0403172v1

Physics

Quantum Physics

6 pages

Scientific paper

We present a protocol for quantum cryptographic network consisting of a quantum network center and many users, in which any pair of parties with members chosen from the whole users on request can secure a quantum key distribution by help of the center. The protocol is based on the quantum authentication scheme given by Barnum et al. [Proc. 43rd IEEE Symp. FOCS'02, p. 449 (2002)]. We show that exploiting the quantum authentication scheme the center can safely make two parties share nearly perfect entangled states used in the quantum key distribution. This implies that the quantum cryptographic network protocol is secure against all kinds of eavesdropping.

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