38 research outputs found
The Engineering of Software-Defined Quantum Key Distribution Networks
Quantum computers will change the cryptographic panorama. A technology once
believed to lay far away into the future is increasingly closer to real world
applications. Quantum computers will break the algorithms used in our public
key infrastructure and in our key exchange protocols, forcing a complete
retooling of the cryptography as we know it. Quantum Key distribution is a
physical layer technology immune to quantum or classical computational threats.
However, it requires a physical substrate, and optical fiber has been the usual
choice. Most of the time used just as a point to point link for the exclusive
transport of the delicate quantum signals. Its integration in a real-world
shared network has not been attempted so far. Here we show how the new
programmable software network architectures, together with specially designed
quantum systems can be used to produce a network that integrates classical and
quantum communications, including management, in a single, production-level
infrastructure. The network can also incorporate new quantum-safe algorithms
and use the existing security protocols, thus bridging the gap between today's
network security and the quantum-safe network of the future. This can be done
in an evolutionary way, without zero-day migrations and the corresponding
upfront costs. We also present how the technologies have been deployed in
practice using a production network.Comment: 7 pages, 4 figures, Accepted for publication in the IEEE
Communications Magazine, Future Internet: Architectures and Protocols issu
Quantum Technologies: Implications for European Policy: Issues for debate
New technologies for communications, computing, sensing and timing, which exploit quantum physics more deeply than heretofore, are expected to have high impact and to require a European policy response. This paper raises key discussion points, as a contribution to a wider EC initiative.JRC.G.5-Security technology assessmen
Quantum key distribution: A networking perspective
The convergence of quantum cryptography with applications used in everyday life is a topic drawing attention from the industrial and academic worlds. The development of quantum electronics has led to the practical achievement of quantum devices that are already available on the market and waiting for their first application on a broader scale. A major aspect of quantum cryptography is the methodology of Quantum Key Distribution (QKD), which is used to generate and distribute symmetric cryptographic keys between two geographically separate users using the principles of quantum physics. In previous years, several successful QKD networks have been created to test the implementation and interoperability of different practical solutions. This article surveys previously applied methods, showing techniques for deploying QKD networks and current challenges of QKD networking. Unlike studies focusing on optical channels and optical equipment, this survey focuses on the network aspect by considering network organization, routing and signaling protocols, simulation techniques, and a software-defined QKD networking approach.Web of Science535art. no. 9
Practical free-space quantum key distribution
Within the last two decades, the world has seen an exponential increase in the quantity
of data traffic exchanged electronically. Currently, the widespread use of classical
encryption technology provides tolerable levels of security for data in day to day life.
However, with one somewhat impractical exception these technologies are based on
mathematical complexity and have never been proven to be secure. Significant advances
in mathematics or new computer architectures could render these technologies obsolete
in a very short timescale.
By contrast, Quantum Key Distribution (or Quantum Cryptography as it is sometimes
called) offers a theoretically secure method of cryptographic key generation and
exchange which is guaranteed by physical laws. Moreover, the technique is capable of
eavesdropper detection during the key exchange process. Much research and
development work has been undertaken but most of this work has concentrated on the
use of optical fibres as the transmission medium for the quantum channel. This thesis
discusses the requirements, theoretical basis and practical development of a compact,
free-space transmission quantum key distribution system from inception to system tests.
Experiments conducted over several distances are outlined which verify the feasibility
of quantum key distribution operating continuously over ranges from metres to intercity distances and finally to global reach via the use of satellites