Quantum direct communication with authentication

Journal Article · Sat Apr 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787078

Lee, Hwayean ^[1]; Lim, Jongin ^[1]; Yang, HyungJin ^[1]

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1. Center for Information Security Technologies (CIST) and Graduate School of Information Security (GSIS), Korea University, Anam Dong, Sungbuk Gu, Seoul (Korea, Republic of)

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.

• OSTI ID: 20787078
• Journal Information: Physical Review. A, Vol. 73, Issue 4; Other Information: DOI: 10.1103/PhysRevA.73.042305; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
DATA TRANSMISSION
ENERGY LEVELS
INFORMATION THEORY
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
SECRECY PROTECTION