Augmentation of Space-based Quantum Key Distribution with CubeSat Systems

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CubeSats (< 10 kg nanosatellites, with dimensions 10-40 cm) offer a cost-effective and rapidly deployed opportunity to bothprovide proof-of-concept to a wider market and technology raising. In some instances, they are also part of the finalservice delivery; for example, in the case of Planet which augments larger satellites with CubeSats for responsive Earthobservation. This feasibility study seeks to determine the extent to which the momentum and agility of the CubeSatmarketplace and the progress made in overall performance can be applied and aligned to support and capitalise on theemergence of space-based Quantum Key Distribution, harnessing the developments already underway within the UK inpayload systems. QKD offers a highly secure method for key distribution critical to modern data systems security fromfinancial transactions to military communications. The work will inform mission architecture, interface specification, systemtesting and development roadmaps, and further provide a systems-view across stakeholders. The approach will identifyopportunities to accelerate and augment the technology or service readiness of space-based QKD using CubeSats.