Scientists just sent unhackable quantum keys across 120 kilometers

Scientists have taken a major step toward ultra-secure quantum communication by demonstrating a remarkably stable quantum encryption system that worked across more than 120 kilometers of optical fiber. Using tiny semiconductor quantum dots that emit single particles of light on demand, the team achieved one of the highest secure key rates yet for this type of technology while maintaining continuous operation for over six hours without manual adjustments.

National Security Agency/Central Security Service > Cybersecurity > Quantum Key Distribution (QKD) and Quantum Cryptography QC

PQC-Enhanced QKD Networks: A Layered Approach

We present a layered and modular network architecture that combines Quantum Key Distribution (QKD) and Post-Quantum Cryptography (PQC) to provide scalable end-to-end security across long distance multi-hop, trusted-node quantum networks. To ensure interoperability and efficient practical deployment, hop-wise tunnels between physically secured nodes are protected by WireGuard with periodically rotated pre-shared keys sourced via the ETSI GS QKD 014 interface. On top, Rosenpass performs a PQC key exchange to establish an end-to-end data channel without modifying deployed QKD devices or network protocols. This dual-layer composition yields post-quantum forward secrecy and authenticity under practical assumptions. We implement the design using open-source components and validate and evaluate it in simulated and lab test-beds. Experiments show uninterrupted operation over multi-hop paths, low resource footprint and fail-safe mechanisms. We further discuss the design's compositional security, wherein the security of each individual component is preserved under their combination and outline migration paths for operators integrating QKD-aware overlays in existing infrastructures.

Behördenkommunikation quantensicher gestalten

Wie können staatliche Stellen sensible Informationen auch im Zeitalter leistungsfähiger Quantencomputer sicher austauschen? Heute startet ein neues von der FFG gefördertes Forschungsprojekt, das konkrete, praxistaugliche Lösungen auf Basis von quantensicheren Verfahren entwickelt. Ein Team der Universität Innsbruck beleuchtet die ethisch-rechtliche Einordnung.

Quantenschlüssel gegen Lauscher quer durch Deutschland - Oiger

Abhörsichere Anrufe und Datenpakete für Telemedizin und Firmengeheimnisse: Ostdeutsche bauen Quantennetze quer durch Deutschland

China Just Pushed Device-Independent QKD (DI-QKD) to 100 Kilometres

A team at the University of Science and Technology of China (USTC) published a paper in Science that quietly redrew the map of what device-independent quantum key distribution (DI-QKD) can do. Led by Bo-Wei Lu, Chao-Wei Yang, Run-Qi Wang, Xiao-Hui Bao, and the ever-present Jian-Wei Pan - the physicist sometimes called China's quantum communications supremo - the experiment demonstrated DI-QKD across 11 kilometres of optical fibre with full finite-key security, and showed positive key rates extending to 100 kilometres in the asymptotic regime. To appreciate why this matters, consider where DI-QKD stood just three and a half years ago. (I

El White Paper de MasterCard que urge a pasar a Quantum Safe: Post-Quantum Cryptography (PQC) & Quantum Key Distribution (QKD)

Blog personal de Chema Alonso ( https://MyPublicInbox.com/ChemaAlonso ): Ciberseguridad, IA, Innovación, Tecnología, Cómics & Cosas Personasles.