A scheme for secure direct communication using EPR pairs and teleportation


DOI: 10.1140/epjb/e2004-00296-4

Cite this article as:
Yan, F.L. & Zhang, X.Q. Eur. Phys. J. B (2004) 41: 75. doi:10.1140/epjb/e2004-00296-4


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.

Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.CCAST (World Laboratory)BeijingP.R. China
  2. 2.Department of PhysicsHebei Normal UniversityShijiazhuangP.R. China

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