Cooperative terahertz quantum key distribution: Secret key rate analysis and optimization

IF 2 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Physical Communication Pub Date : 2024-11-23 DOI:10.1016/j.phycom.2024.102551

Parth Toshniwal , Justin Jose , Sumit Gautam , Vimal Bhatia , Ondrej Krejcar

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引用次数: 0

Abstract

In the recent years, there has been a growing interest in quantum key distribution (QKD) as a promising alternative to conventional cryptographic methods. QKD offers potential for ensuring absolute security in communication networks, leveraging the principles of quantum mechanics. This study diverges from previous research by investigating a cooperative continuous variable QKD (CVQKD) system operating at terahertz (THz) frequencies with multiple input multiple output (MIMO) technology, wherein the source and destination are assisted by a trusted decode-and-forward (DF) relay. Our focus lies on evaluating the secret key rate (SKR) of this system under direct reconciliation conditions and subsequently optimizing power and relay location to maximize the SKR. We address the practical concern of potential eavesdropping between the relay and the destination. Specifically, our analysis centers on the SKR performance of the coherent state-based CVQKD protocol under direct reconciliation conditions. Through numerical simulations, we demonstrate the significant enhancement in SKR achievable through optimization in the cooperative QKD system, yielding several noteworthy insights.

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来源期刊

Physical Communication ENGINEERING, ELECTRICAL & ELECTRONICTELECO-TELECOMMUNICATIONS

CiteScore

5.00

自引率

9.10%

发文量

212

审稿时长

55 days

期刊介绍： PHYCOM: Physical Communication is an international and archival journal providing complete coverage of all topics of interest to those involved in all aspects of physical layer communications. Theoretical research contributions presenting new techniques, concepts or analyses, applied contributions reporting on experiences and experiments, and tutorials are published. Topics of interest include but are not limited to: Physical layer issues of Wireless Local Area Networks, WiMAX, Wireless Mesh Networks, Sensor and Ad Hoc Networks, PCS Systems; Radio access protocols and algorithms for the physical layer; Spread Spectrum Communications; Channel Modeling; Detection and Estimation; Modulation and Coding; Multiplexing and Carrier Techniques; Broadband Wireless Communications; Wireless Personal Communications; Multi-user Detection; Signal Separation and Interference rejection: Multimedia Communications over Wireless; DSP Applications to Wireless Systems; Experimental and Prototype Results; Multiple Access Techniques; Space-time Processing; Synchronization Techniques; Error Control Techniques; Cryptography; Software Radios; Tracking; Resource Allocation and Inference Management; Multi-rate and Multi-carrier Communications; Cross layer Design and Optimization; Propagation and Channel Characterization; OFDM Systems; MIMO Systems; Ultra-Wideband Communications; Cognitive Radio System Architectures; Platforms and Hardware Implementations for the Support of Cognitive, Radio Systems; Cognitive Radio Resource Management and Dynamic Spectrum Sharing.