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- Title
Two-step orthogonal-state-based protocol of quantum secure direct communication with the help of order-rearrangement technique.
- Authors
Yadav, Preeti; Srikanth, R.; Pathak, Anirban
- Abstract
The Goldenberg-Vaidman (GV) protocol for quantum key distribution uses orthogonal encoding states of a particle. Its security arises because operations accessible to Eve are insufficient to distinguish the two states encoding the secret bit. We propose a two-particle cryptographic protocol for quantum secure direct communication, wherein orthogonal states encode the secret, and security arises from restricting Eve from accessing any two-particle operations. However, there is a non-trivial difference between the two cases. While the encoding states are perfectly indistinguishable in GV, they are partially distinguishable in the bipartite case, leading to a qualitatively different kind of information-versus-disturbance trade-off and also options for Eve in the two cases.
- Subjects
QUANTUM states; PARTICLE physics; ENCODING; CRYPTOGRAPHY; TELECOMMUNICATION security; QUANTUM information theory
- Publication
Quantum Information Processing, 2014, Vol 13, Issue 12, p2731
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-014-0825-8