Quantum direct communication protocols using discrete-time quantum walk

The unique features of quantum walk, such as the possibility of the walker to be in superposition of the position space and get entangled with the position space, provide inherent advantages that can be captured to design highly secure quantum communication protocols. Here we propose two quantum dir...

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Bibliographic Details
Published in:Quantum information processing 2020, Vol.19 (9), Article 295
Main Authors: Srikara, S., Chandrashekar, C. M.
Format: Article
Language:English
Subjects:
Communication
Data Structures and Information Theory
Denial of service attacks
Energy management
Mathematical Physics
Physics
Physics and Astronomy
Quantum Computing
Quantum Information Technology
Quantum Physics
Qubits (quantum computing)
Spintronics
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Summary:The unique features of quantum walk, such as the possibility of the walker to be in superposition of the position space and get entangled with the position space, provide inherent advantages that can be captured to design highly secure quantum communication protocols. Here we propose two quantum direct communication protocols, a quantum secure direct communication protocol and a controlled quantum dialogue (CQD) protocol using discrete-time quantum walk on a cycle. The proposed protocols are unconditionally secure against various attacks such as the intercept-resend attack, the denial of service attack, and the man-in-the-middle attack. Additionally, the proposed CQD protocol is shown to be unconditionally secure against an untrusted service provider and both the protocols are shown more secure against the intercept resend attack as compared to the qubit-based LM05/DL04 protocol.
ISSN:1570-0755
1573-1332
DOI:10.1007/s11128-020-02793-4