Observatorio de I+D+i UPM

Memorias de investigación
Other publications:
Networks based on QKD and weakly trusted repeaters
Year:2013
Research Areas
  • Information technology and adata processing
Information
Abstract
We study how to use quantum key distribution (QKD) in common optical network infrastructures and propose a method to overcome its distance limitations. QKD is the first technology offering information theoretic secret-key distribution that relies only on the fundamental principles of quantum physics. Point-to-point QKD devices have reached a mature industrial state; however, these devices are severely limited in distance, since signals at the quantum level (e.g. single photons) are highly affected by the losses in the communication channel and intermediate devices. To overcome this limitation, intermediate nodes (i.e. repeaters) are used. Both, quantum-regime and trusted, classical, repeaters have been proposed in the QKD literature, but only the latter can be implemented in practice. As a novelty, we propose here a new QKD network model based on the use of not fully trusted intermediate nodes, referred as weakly trusted repeaters. This approach forces the attacker to simultaneously break several paths to get access to the exchanged key, thus improving significantly the security of the network. We formalize the model using network codes and provide real scenarios that allow users to exchange secure keys over metropolitan optical networks using only passive components.
International
Si
Entity
Place
Pages
Reference/URL
http://2013.qcrypt.net/
Publication type
Póster
Participants
  • Autor: Jesus Martinez Mateo (UPM)
  • Autor: Alex Ciurana Aguilar (UPM)
  • Autor: Vicente Martin Ayuso (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de investigación en Información y Computación Cuántica (GIICC)
  • Departamento: Matemática Aplicada (Facultad de Informática)
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Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)