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We present a ground-to-space quantum key distribution (QKD) mission conceptand the accompanying feasibility study for the development of the low earthorbit CubeSat payload. The quantum information is carried by single photonswith the binary codes represented by polarization states of the photons.Distribution of entangled photons between the ground and the satellite can beused to certify the quantum nature of the link: a guarantee that noeavesdropping can take place. By placing the entangled photon source on theground, the space segments contains only the less complex detection system,enabling its implementation in a compact enclosure, compatible with the 12UCubeSat standard (12 dm3). This reduces the overall cost of the project, makingit an ideal choice as a pathfinder for future European quantum communicationsatellite missions. The space segment is also more versatile than one thatcontains the source since it is compatible with a multiple of QKD protocols(not restricted to entangled photon schemes) and can be used in quantum physicsexperiments, such as the investigation of entanglement decoherence. Otherpossible experiments include atmospheric transmission/turbulencecharacterization, dark area mapping, fine pointing and tracking, and accurateclock synchronization; all crucial for future global scale quantumcommunication efforts.

Nanobob: A Cubesat Mission Concept For Quantum Communication Experiments In An Uplink Configuration