Global Quantum Key Distribution using CubeSat-Based Photon Sources

The future of secure communication networks relies on the secure distribution of symmetric encryption keys. Current methods of distributing keys are either vulnerable (public key encryption has the capability of being cracked with quantum computers) or are expensive (couriers physically delivering keys to remote locations). The most secure method is to distribute keys from small satellites using Quantum Key Distribution (QKD). S15 Space Systems is a spin-off company that is developing space-based, quantum-safe communications built on research performed at the Centre for Quantum Technologies (CQT) at the National University of Singapore. The team is developing technologies such as QKD which harness unique properties of quantum physics to enable highly secured encryption services. QKD can generate encryption keys that are secure against computational hacks and that can be distributed to remote parties with solid guarantees that they have not been intercepted by man-in-the-middle eavesdroppers. Quantum light source hardware is being developed that fits on a 3U CubeSat, and a small constellation of these satellites can effectively service thousands of users

The FC-1D: The profitable alternative Flying Circus Commercial Aviation Group

The FC-1D was designed as an advanced solution for a low cost commercial transport meeting or exceeding all of the 1993/1994 AIAA/Lockheed request for proposal requirements. The driving philosophy behind the design of the FC-1D was the reduction of airline direct operating costs. Every effort was made during the design process to have the customer in mind. The Flying Circus Commercial Aviation Group targeted reductions in drag, fuel consumption, manufacturing costs, and maintenance costs. Flying Circus emphasized cost reduction throughout the entire design program. Drag reduction was achieved by implementation of the aft nacelle wing configuration to reduce cruise drag and increase cruise speeds. To reduce induced drag, rather than increasing the wing span of the FC-1D, spiroids were included in the efficient wing design. Profile and friction drag are reduced by using riblets in place of paint around the fuselage and empennage of the FC-1D. Choosing a single aisle configuration enabled the Flying Circus to optimize the fuselage diameter. Thus, reducing fuselage drag while gaining high structural efficiency. To further reduce fuel consumption a weight reduction program was conducted through the use of composite materials. An additional quality of the FC-1D is its design for low cost manufacturing and assembly. As a result of this design attribute, the FC-1D will have fewer parts which reduces weight as well as maintenance and assembly costs. The FC-1D is affordable and effective, the apex of commercial transport design