2003/11/19 by Fengli Yan, Xiang Zhang, Xiaoqiang Zhang · 2 citations
Computer Science · Mathematics · Physics and Astronomy · #Alice (programming language) #Alice and Bob #Combinatorics #Computer science #Mathematics #No-teleportation theorem #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum information #Quantum mechanics #Quantum teleportation #Qubit #Teleportation #Topology (electrical circuits) #quant-ph
paper · pdf · doi:10.1140/epjb/e2004-00296-4
published as The European Physical Journal B, 41 (2004) 75
arxiv created 2003/11/19 · openalex publication_date 2004/09/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 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 carry the secret message between Alice and Bob, it is completely secure for direct secret communication if perfect quantum channel is used.