2 research outputs found
High-speed Privacy Amplification Scheme using GMP in Quantum Key Distribution
Privacy amplification (PA) is the art of distilling a highly secret key from
a partially secure string by public discussion. It is a vital procedure in
quantum key distribution (QKD) to produce a theoretically unconditional secure
key. The throughput of PA has become a bottleneck of the high-speed discrete
variable QKD (DV-QKD) system. In this paper, a high-speed modular arithmetic
hash PA scheme with GNU multiple precision (GMP) arithmetic library is
presented. This scheme is implemented on two different central processing unit
(CPU) platforms. The experimental results demon-strate that the throughput of
this scheme achieves 260Mbps on the block size of 10^6 and 140Mbps on the block
size of 10^8. This is the highest-speed recorded PA scheme on CPU platform to
the author's knowledge.Comment: 5 pages. 6 figure
Mathematical Model and Topology Evaluation of Quantum Secure Communication Network
Due to the intrinsic point-to-point 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 large-scale 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 flow-based 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
Information-Theoretic Secure communication bound, and the corresponding linear
programming-based 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.Comment: 16 pages, 4 figure