Two-step quantum direct communication protocol using the Einstein-Podolsky-Rosen pair block
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- 20 October 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 68 (4), 042317
- https://doi.org/10.1103/physreva.68.042317
Abstract
A protocol for quantum secure direct communication using blocks of Einstein-Podolsky-Rosen (EPR) pairs is proposed. A set of ordered N EPR pairs is used as a data block for sending secret message directly. The ordered N EPR set is divided into two particle sequences, a checking sequence and a message-coding sequence. After transmitting the checking sequence, the two parties of communication check eavesdropping by measuring a fraction of particles randomly chosen, with random choice of two sets of measuring bases. After insuring the security of the quantum channel, the sender Alice encodes the secret message directly on the message-coding sequence and sends them to Bob. By combining the checking and message-coding sequences together, Bob is able to read out the encoded messages directly. The scheme is secure because an eavesdropper cannot get both sequences simultaneously. We also discuss issues in a noisy channel.Keywords
This publication has 33 references indexed in Scilit:
- Quantum Key Distribution in the Holevo LimitPhysical Review Letters, 2000
- Quantum key distribution without alternative measurementsPhysical Review A, 2000
- Optimal Eavesdropping in Quantum Cryptography with Six StatesPhysical Review Letters, 1998
- Quantum cryptography without public announcement of basesPhysics Letters A, 1998
- Quantum Cryptography Based on Split Transmission of One-Bit Information in Two StepsPhysical Review Letters, 1997
- Quantum Cryptography Based on Orthogonal StatesPhysical Review Letters, 1995
- Quantum cryptography with coherent statesPhysical Review A, 1995
- Quantum cryptography using any two nonorthogonal statesPhysical Review Letters, 1992
- Quantum cryptography without Bell’s theoremPhysical Review Letters, 1992
- Quantum cryptography based on Bell’s theoremPhysical Review Letters, 1991