9 research outputs found
Topological optimization of quantum key distribution networks
A Quantum Key Distribution (QKD) network is an infrastructure that allows the
realization of the key distribution cryptographic primitive over long distances
and at high rates with information-theoretic security. In this work, we
consider QKD networks based on trusted repeaters from a topology viewpoint, and
present a set of analytical models that can be used to optimize the spatial
distribution of QKD devices and nodes in specific network configurations in
order to guarantee a certain level of service to network users, at a minimum
cost. We give details on new methods and original results regarding such cost
minimization arguments applied to QKD networks. These results are likely to
become of high importance when the deployment of QKD networks will be addressed
by future quantum telecommunication operators. They will therefore have a
strong impact on the design and requirements of the next generation of QKD
devices.Comment: 25 pages, 4 figure
Security of continuous-variable quantum key distribution: towards a de Finetti theorem for rotation symmetry in phase space
info:eu-repo/semantics/publishe
SECOQC White Paper on Quantum Key Distribution and Cryptography
The SECOQC White Paper on Quantum Key Distribution and Cryptography is the outcome on a thorough consultation and discussion among the participants of the European project SECOQC (www.secoqc.net). This paper is a review article that attempts to position Quantum Key Distribution (QKD) in terms of cryptographic applications. A detailed comparison of QKD with the solutions currently in use to solve the key distribution problem, based on classical cryptography, is provided. We also detail how the work on QKD networks lead within SECOQC will allow the deployment of long-distance secure communication infrastructures based on quantum cryptography. The purpose of the White Paper is finally to promote closer collaboration between classical and quantum cryptographers. We believe that very fruitful research, involving both communities, could emerge in the future years and try to sketch what may be the next challenges in this direction