A scheme for secure direct communication using EPR pairs and teleportation

A scheme for secure direct communication using EPR pairs and teleportation A novel scheme for secure direct communication between Alice and Bob is proposed, where there is no need for establishing a shared secret key. The communication is based on Einstein-Podolsky-Rosen (EPR) pairs and teleportation between Alice and Bob. After insuring the security of the quantum channel (EPR pairs), Bob encodes the secret message directly on a sequence of particle states and transmits them to Alice by teleportation. In this scheme teleportation transmits Bob’s message without revealing any information to a potential eavesdropper. Alice can read out the encoded messages directly by the measurement on her qubits. Because there is not a transmission of the qubit which carries the secret message between Alice and Bob, it is completely secure for direct secret communication if perfect quantum channel is used. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The European Physical Journal B - Condensed Matter and Complex Systems Springer Journals

A scheme for secure direct communication using EPR pairs and teleportation

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Publisher
Springer Journals
Copyright
Copyright © 2004 by EDP Sciences, Società Italiana di Fisica, and Springer-Verlag
Subject
Physics
ISSN
1434-6028
eISSN
1434-6036
D.O.I.
10.1140/epjb/e2004-00296-4
Publisher site
See Article on Publisher Site

Abstract

A novel scheme for secure direct communication between Alice and Bob is proposed, where there is no need for establishing a shared secret key. The communication is based on Einstein-Podolsky-Rosen (EPR) pairs and teleportation between Alice and Bob. After insuring the security of the quantum channel (EPR pairs), Bob encodes the secret message directly on a sequence of particle states and transmits them to Alice by teleportation. In this scheme teleportation transmits Bob’s message without revealing any information to a potential eavesdropper. Alice can read out the encoded messages directly by the measurement on her qubits. Because there is not a transmission of the qubit which carries the secret message between Alice and Bob, it is completely secure for direct secret communication if perfect quantum channel is used.

Journal

The European Physical Journal B - Condensed Matter and Complex SystemsSpringer Journals

Published: Sep 1, 2004

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