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Quantum walk-based protocol for secure communication between any two directly connected nodes on a network

Chawla, P and Ajith, A and Chandrashekar, CM (2023) Quantum walk-based protocol for secure communication between any two directly connected nodes on a network. In: Physica Scripta, 98 (10).

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Official URL: https://doi.org/10.1088/1402-4896/acfad0


The utilization of quantum entanglement as a cryptographic resource has superseded conventional approaches to secure communication. Security and fidelity of intranetwork communication between quantum devices is the backbone of a quantum network. This work presents an protocol that generates entanglement between any two directly connected nodes of a quantum network to be used as a resource to enable quantum communication across that pair in the network. The protocol is based on a directed discrete-time quantum walk and paves the way for private inter-node quantum communication channels in the network. We also present the simulation results of this protocol on random networks generated from various models. We show that after implementation, the probability of the walker being at all nodes other than the source and target is negligible and this holds independent of the random graph generation model. This constitutes a viable method for the practical realisation of secure communication over any random network topology. © 2023 IOP Publishing Ltd.

Item Type: Journal Article
Publication: Physica Scripta
Publisher: Institute of Physics
Additional Information: The copyright for this article belongs to author.
Keywords: Graph theory; Internet protocols; Network security; Quantum cryptography; Secure communication, Conventional approach; Cryptographic resources; Discrete time; Intranetworks; Quantum algorithms; Quantum device; Quantum network; Quantum walk; Random network; Time quantum, Quantum communication
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 04 Mar 2024 09:17
Last Modified: 04 Mar 2024 09:17
URI: https://eprints.iisc.ac.in/id/eprint/84264

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