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 | |
| Publication status | Published - 2006 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
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Cite this
Lee, H., Lim, J., & Yang, H. (2006). Quantum direct communication with authentication. Physical Review A - Atomic, Molecular, and Optical Physics, 73(4), [042305]. https://doi.org/10.1103/PhysRevA.73.042305