Article-Journal | UCS

DemoQuanDT: a carrier-grade QKD network

Mon, 04 Aug 2025 05:01:40 +0000

Abstract

Quantum key distribution networks (QKDNs) enable secure communication even in the age of powerful quantum computers. In the hands of a network operator, which can offer its service to many users, the economic viability of a QKDN increases significantly. The highly challenging operator–user relationship in a large-scale network setting demands additional requirements to ensure carrier-grade operation. Addressing this challenge, this work presents a carrier-grade QKDN architecture, which combines the functional QKDN architecture with the operational perspective of a network operator, ultimately enhancing the economic viability of QKDNs. The focus is on the network and key management aspects of a QKDN while assuming state-of-the-art commercial QKD modules. The presented architecture was rolled out within an in-field demonstrator, connecting the cities of Berlin and Bonn over a link distance of 923 km across Germany. We could show that the proposed network architecture is feasible, integrable, and scalable, making it suitable for deployment in real-world networks. Overall, the presented carrier-grade QKDN architecture promises to serve as a blueprint for network operators providing QKD-based services to their customers.

Toward Next Generation Quantum-Safe eIDs and eMRTDs: A Survey

Sat, 16 Mar 2024 05:00:48 +0000

Abstract

Security mechanisms of Electronic Personal Documents (eCards) depend on (asymmetric) cryptography that is and always has been subject to the threat of compromise, be it from conventional attacks or quantum computers. With Post-Quantum Cryptography (PQC), we now have alternative building blocks at hand that can be leveraged to protect against both kind of attacks. Thus, PQC should be incorporated into eCard ecosystems, yet it is not clear how this is done best. In the work at hand, we review the state of currently used crypto-systems for eCard security, as well as their possible quantum-secure replacements. Further, we identify and categorize respective challenges that need to be addressed, present and assess existing approaches for their solution, and formulate research questions for open issues. By providing an overview of the situation, we help unraveling the issue and pave the way toward quantum-safe electronic Identity Documents and electronic Machine-Readable Travel Documents.

Datenschutz muss benutzbar sein

Tue, 01 Jan 2019 00:00:00 +0000

Zusammenfassung

Mit der EU-Datenschutzgrundverordnung sind die Rechte der betroffenen Person ausgeweitet und gestärkt worden. Diese Rechte bilden ein zentrales Prinzip des Datenschutzrechts, indem sie die Selbstkontrolle bei der Verarbeitung personenbezogener Daten ermöglichen. Es ist jedoch zu befürchten, dass Betroffene ihre Rechte in der Praxis nicht wahrnehmen, sofern dies nicht in einfacher Weise geschehen kann. In diesem Beitrag wird vorgeschlagen, die Erkenntnisse aus dem Forschungsgebiet Usable Security and Privacy anzuwenden, um zu benutzerfreundlichen Lösungen für den Datenschutz zu kommen. Dazu wird aufgezeigt, wie in diesem Gebiet diskutierte Konzepte helfen können, den mit den Betroffenenrechten verbundenen Herausforderungen zu begegnen.

Alle reden über Blockchain

Sun, 01 Jan 2017 00:00:00 +0000