A prototype of a free-space QKD scheme based on the B92 protocol

We describe the architecture of QuAKE (Quantum Advanced Key Exchanger), an experimental setup for quantum key distribution (QKD) over a free-space quantum channel based on the B92 protocol [1]. The system consists of a transmitter (Alice) and a receiver (Bob) that are connected through a free-space quantum channel over a distance of approximately 50 m, and are each driven by a field-programmable gate array (FPGA). The raw key shared by Alice and Bob is processed in four subsequent steps (i.e., sifting, channel estimation, key reconciliation and privacy amplification) which are implemented in Matlab. Finally, public discussion is implemented with the user datagram protocol (UDP) transport protocol running over the Internet protocol (IP) network protocol, while 802.11g underlies the physical layer transmission

Silk fibroin textile structures as biomimetic prosthetics for the regeneration of tissues and ligaments

The invention concerns a silk fibroin weave structure comprising a concentric tubular outer sheath and an inner core, wherein said sheath is a woven fabric with interlaced loop and said core is a woven fabric with interlaced loop or is braided using a braiding machine. The silk fibroin used to weave the structure of the invention is a silk yarn with a linear density comprised of between approx. 40 den and approx. 640 den, preferably, the linear density is approx. 80 den or approx. 320 den. The core of the structure has a mean pore area comprised of between 0.001 and 2.000 mm 2 , while the outer sheath has a mean pore area comprised of between 0.005 and 15.000 mm 2 . The structure of the invention is used for the in vivo or in vitro regeneration of ligaments, particularly the anterior cruciate ligament, tendons, muscles and blood vessels.; Furthermore, the structure promotes in vivo and in vitro cell adhesion and proliferation

Performance analysis of a low-cost, low-complexity, free-space QKD scheme based on the B92 protocol

We present the performance results of QuAKE (Quantum Advanced Key Exchanger), a QKD scheme over a free-space quantum channel based on an implementation of the B92 protocol