Mathematical model and topology evaluation of quantum key distribution network
Abstract
Due to the intrinsic pointtopoint characteristic of quantum key distribution (QKD) systems, it is necessary to study and develop QKD network technology to provide a secure communication service for a largescale of nodes over a large area. Considering the quality assurance required for such a network and the cost limitations, building an effective mathematical model of a QKD network becomes a critical task. In this paper, a flowbased mathematical model is proposed to describe a QKD network using mathematical concepts and language. In addition, an investigation on QKD network topology evaluation was conducted using a unique and novel QKD network performance indicator, the InformationTheoretic Secure communication bound, and the corresponding linear programmingbased calculation algorithm. A large number of simulation results based on the topologies of SECOQC network and NSFNET network validate the effectiveness of the proposed model and indicator.
 Publication:

Optics Express
 Pub Date:
 March 2020
 DOI:
 10.1364/OE.387697
 arXiv:
 arXiv:1909.02463
 Bibcode:
 2020OExpr..28.9419L
 Keywords:

 Quantum Physics;
 Computer Science  Cryptography and Security
 EPrint:
 16 pages, 4 figures