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Encontradas 3 publicações
Temas Prioritários: Fotônica Integrada e Tecnologias Quânticas2026
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2026 26th International Conference on Transparent Optical Networks (ICTON)

Network Design in Multiple Non-Overlapping Paths within Quantum Key Distribution Networks

NJANDA, Ange Joel N.; TOMKELSKI, Anderson; ANDRÉ, Paulo; ASSIS, Karcius D. R.

Tipos de publicação: Anais de Congresso, Paper

The increasing demand for secure communication makes Quantum Key Distribution (QKD) a compelling technology, as it exploits the fundamental principles of quantum physics to enhance secure data transmission. However, practical deployment faces limitations such as limited transmission distances and dedicated hardware-channel requirements. This paper proposes a linear programming-based model that jointly addresses routing, wavelength assignment, and trusted-node minimization in QKD networks with wavelength division multiplexing (WDM), considering that the secret key rate becomes impractical beyond a given transmission distance, thus requiring the relaying of secret keys through trusted repeaters. In particular, the study contrasts scenarios where traffic is concentrated along a single route with those where key rates are split and routed over multiple nonoverlapping paths (MNOPs) using two mechanisms: Concatenate Multipart (CM) and Bitwise Product Multipath (BPM). While the literature shows that MNOPs can improve security (BPM) and improve the secret key rate (CM), we demonstrate that these mechanisms come with additional deployment costs.

#Optical Networks#Optimization#Quantum Networks
Temas Prioritários: Fotônica Integrada e Tecnologias Quânticas2026
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Optical Fiber Technology

Security-aware non-uniform multipath traffic partitioning for QKD networks: A MILP-based squeezing protection approach

ASSIS, Karcius D. R.; ALMEIDA JR, Raul C.; TOMKELSKI, Anderson; PIRES, João; ANDRÉ, Paulo S. B.

Tipos de publicação: Artigo

Quantum Key Distribution (QKD) enables information-theoretic secure key exchange, but the deployment of large-scale QKD networks introduces new challenges related to routing, resource allocation, and security exposure in trusted-node-based architectures. In multipath QKD networks, the secret key rate can be partitioned and transmitted over multiple link-disjoint paths, so that an adversary must simultaneously compromise all paths to reconstruct the complete secret key. However, traffic is often equally distributed across the available disjoint paths, although such uniform partitioning may be suboptimal when candidate paths exhibit heterogeneous vulnerability levels. This paper proposes a security-aware optimization framework for QKD-enabled optical networks that determines a non-uniform multipath traffic partitioning strategy aimed at minimizing the expected amount of eavesdropped traffic. The proposed approach is formulated as a Mixed-Integer Linear Programming (MILP) model that integrates probabilistic secrecy metrics derived from trusted node compromise probabilities, a traffic vulnerability threshold that limits partial information exposure, and adaptive bandwidth squeezing protection to ensure service continuity under failure scenarios. The model jointly optimizes traffic allocation and excess key capacity, allowing the protection overhead to be dynamically determined according to security and resilience requirements. Numerical evaluations conducted on both a toy topology and the Pan-European network demonstrate that the proposed exposure-aware partitioning strategy significantly reduces the expected eavesdropped traffic compared to conventional equal-splitting approaches while maintaining resilience guarantees. These results highlight the potential of security-driven traffic engineering for the design of resilient and efficient multipath QKD networks.

#Optical Networks#Optimization#Quantum Networks
Temas Prioritários: Fotônica Integrada e Tecnologias Quânticas2026
Acessar publicação
2026 26th International Conference on Transparent Optical Networks (ICTON)

Network Design in Multiple Non-Overlapping Paths within Quantum Key Distribution Networks

NJANDA, Ange Joel N.; TOMKELSKI, Anderson; ANDRÉ, Paulo; ASSIS, Karcius D. R.

Tipos de publicação: Anais de Congresso

The increasing demand for secure communication makes quantum key distribution (QKD) a compelling technology, as it exploits the fundamental principles of quantum physics to enhance secure data transmission. However, practical deployment faces limitations such as limited transmission distances and dedicated hardware-channel requirements. This paper proposes a linear programming-based model that jointly addresses routing, wavelength assignment, and trusted-node minimization in QKD networks with wavelength division multiplexing (WDM), considering that the secret key rate becomes impractical beyond a given transmission distance, thus requiring the relaying of secret keys through trusted repeaters. In particular, the study contrasts scenarios where traffic is concentrated along a single route with those where key rates are split and routed over multiple nonoverlapping paths (MNOPs) using two mechanisms: Concatenate Multipart (CM) and Bitwise Product Multipath (BPM). While the literature shows that MNOPs can improve security (BPM) and improve the secret key rate (CM), we demonstrate that these mechanisms come with additional deployment costs.

#Optical Networks#Optimization#Quantum Networks