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Memorias de investigación
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Networks based on QKD and weakly trusted repeaters
Año:2013
Áreas de investigación
  • Ciencias de la computación y tecnología informática
Datos
Descripción
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.
Internacional
Si
Entidad
Lugar
Páginas
Referencia/URL
http://2013.qcrypt.net/
Tipo de publicación
Póster
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Jesus Martinez Mateo (UPM)
  • Autor: Alex Ciurana Aguilar (UPM)
  • Autor: Vicente Martin Ayuso (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de investigación en Información y Computación Cuántica (GIICC)
  • Departamento: Matemática Aplicada (Facultad de Informática)
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