Tripartite Layered Quantum Key Distribution Scheme with a Symmetrical Key Structure

Asymmetric entanglement could provide a crucial layered key structure for quantum cryptography. A new symmetrical tripartite quantum key distribution scheme based on the simplest layered quantum key distribution (L-QKD) model is devised. With an interesting rotational symmetrical key distribution sc...

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Bibliographic Details
Published inInternational journal of theoretical physics Vol. 59; no. 2; pp. 562 - 573
Main Authors Zhang, Xiao-Hao, Yan, Xing-Yu, Wang, Yun-Qian, Gong, Li-Hua
Format Journal Article
LanguageEnglish
Published New York Springer US 01.02.2020
Springer Nature B.V
Subjects
Butterflies & moths
Elementary Particles
Encryption
Entangled states
Information theory
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum cryptography
Quantum entanglement
Quantum Field Theory
Quantum Physics
Theoretical
Asymmetric entangled state
Layered quantum key distribution
Quantum cryptography
Rotational symmetry
Key structure
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Summary:Asymmetric entanglement could provide a crucial layered key structure for quantum cryptography. A new symmetrical tripartite quantum key distribution scheme based on the simplest layered quantum key distribution (L-QKD) model is devised. With an interesting rotational symmetrical key distribution scheme, the proposed tripartite QKD protocol could establish a more integrated key system, which expands the number of conference keys for secure broadcast and distribute layered secret keys among any legitimate participants simultaneously. The proposed scheme is more flexible, robust and efficient to guarantee the fairness among communication parties than the original L-QKD protocol, and our scheme also could be applied to encryption in the butterfly network precisely. Moreover, based on three asymmetric (4, 4, 2) entangled state, a novel symmetric (4, 4, 4) entangled state to implement L-QKD scheme is discussed. Finally, the security of L-QKD scheme is analyzed via information-theoretic proof.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-019-04349-4