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Updated: Jun 27, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
05:30

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Topology-Oblivious Random-Walk Key Relaying in Quantum Key Distribution Networks.

Krišjānis Petručeņa1, Sergejs Kozlovičs1, Juris Vīksna1

  • 1Institute of Mathematics and Computer Science, University of Latvia, LV-1459 Riga, Latvia.

Entropy (Basel, Switzerland)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

This study explores topology-oblivious stochastic forwarding for quantum key distribution (QKD) networks. It demonstrates that decentralized relaying can achieve useful security and efficiency without centralized control.

Keywords:
QKD networksprivacy amplificationquantum key distributionrandom walkstopology-oblivious routingtrusted-node relaying

Related Experiment Videos

Last Updated: Jun 27, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
05:30

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Area of Science:

  • Quantum Information Science
  • Network Security
  • Cryptography

Background:

  • Quantum key distribution (QKD) networks face challenges in managing keys between distant entities lacking direct quantum links.
  • Current relay strategies often depend on centralized control or global routing information, limiting scalability and resilience.

Purpose of the Study:

  • To investigate the feasibility of topology-oblivious stochastic forwarding for QKD relaying.
  • To analyze the security-overhead trade-off in decentralized QKD network designs.
  • To determine if local forwarding can maintain information-theoretic security (ITS).

Main Methods:

  • Modeling QKD key material relaying using random-walk variants.
  • Applying privacy amplification for key reconstruction.
  • Evaluating performance on the GÉANT European academic backbone network topology.
  • Developing and assessing a highest-score-neighbor local path-diversification heuristic.
  • Implementing scouting-based loop erasure for route optimization.

Main Results:

  • Different random-walk variants exhibit distinct security and efficiency characteristics.
  • The proposed heuristic reduces the likelihood of compromised nodes relaying key material.
  • Scouting-based loop erasure effectively shortens routes and enhances throughput.
  • Stochastic forwarding shows comparable or better performance than static methods against adversarial nodes.

Conclusions:

  • Topology-oblivious stochastic forwarding offers a simpler, decentralized alternative for QKD relaying.
  • This approach eliminates the need for centralized orchestration or complex gossip protocols.
  • Decentralized relaying can achieve practical security and efficiency in QKD networks.