One of the key challenges in co-propagation Quantum Key Distribution (QKD) is the noise caused by Raman scattering and broadband detector sensitivity. At Allegro, we're tackling this by improving spectral filtering at the receiver side — a critical step to maximize...
Multiplexing Quantum and Classical Channels: A Step Forward in Practical QKD Deployment
An essential requirement for deploying Quantum Key Distribution (QKD) in real-world Optical Transport Networks (OTNs) is the co-propagation of quantum and classical channels over the same fibre infrastructure. Within the ALLEGRO project (Horizon Europe GA ID:...
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Project Spotlight: Long-Range QKD with Allegro
🔐 In the quantum era, secure communication is more critical than ever. Our latest work at Allegro focuses on enhancing the dynamic range of Quantum Key Distribution (QKD) systems — pushing the limits of how far Alice and Bob can be apart while still securely sharing...
Allegro Project: Advancing Multi-User MDI-QKD Protocols
As part of our work in the Allegro Project, we’ve taken a deeper step into enabling secure quantum key distribution (QKD) between multiple users in realistic network conditions — even in cases of basis mismatch. 1️⃣ Each user randomly selects a bit value b ∈ {0,1} and...
Allegro Project Spotlight: Measurement Device Independent Quantum Key Distribution (MDI-QKD)
After four decades of progress in Quantum Key Distribution (QKD), the demand for unconditional security in real-world networks has never been more critical. As part of the Allegro project, we’ve explored an advanced Measurement Device Independent (MDI) QKD protocol...
Demonstrating Our Integrated Quantum Key Distribution (QKD) Setup
As part of the ALLEGRO Horizon Europe project, we are proud to showcase the performance of our silicon nitride photonic integrated receiver by implementing the three-state time-bin BB84 protocol [Boa18]. 📡 What we’ve built:Our experimental setup integrates a full QKD...
Designing the Future of Secure Communication – Multiprotocol QKD Receiver on Silicon Nitride PICs
At Allegro and Eindhoven University of Technology (TU/e), we're pushing the boundaries of quantum-safe communication by developing a versatile, photonic integrated receiver for quantum key distribution (QKD). This receiver is protocol-flexible, supporting BB84,...
Allegro Project Insight: Traffic Splitting Strategies in Optical Metro-Core Networks
In our second simulation scenario, we explored a more realistic traffic distribution:📦 50% directed to National Nodes🏢 50% routed to a Regional Datacenter We evaluated two distinct traffic splitting approaches: 🔹 P2P-split:Traffic is split at a high-capacity root...
Allegro Project Insight: Cost-Effective Backbone Networks with OSNR-Aware Design
Our latest evaluation focuses on the impact of OSNR budgets and P2P transceiver costs on total network expenditure. 🔍 Highlights from Figures 45 & 46: Figure 45 presents the distribution of P2P transceivers under OSNR degradations of:(a) 1.5 dB/span(b) 3.0...