Quantum direct communication with authentication

Hwayean Lee; Jongin Lim; Hyungjin Yang

doi:10.1103/PhysRevA.73.042305

Quantum direct communication with authentication

Hwayean Lee, Jongin Lim, Hyungjin Yang

Graduate School of Information Study

Research output: Contribution to journal › Article › peer-review

192 Citations (Scopus)

Abstract

We propose two quantum direct communication (QDC) protocols with user authentication. Users can identify each other by checking the correlation of Greenberger-Horne-Zeilinger (GHZ) states. Alice can directly send a secret message to Bob without any previously shared secret using the remaining GHZ states after authentication. Our second QDC protocol can be used even though there is no quantum link between Alice and Bob. The security of the transmitted message is guaranteed by properties of entanglement of GHZ states.

Original language	English
Article number	042305
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	73
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevA.73.042305
Publication status	Published - 2006

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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