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The REASE project aims at developing innovative clustering technology able to significantly improve the performances and robustness of reconfigurable computation in space and in Quantum Key Distribution (QKD) systems. Quantum Key Distribution (QKD) is a leading technology of Quantum Communication (QC) since it allows to realize a secrecy protocol, safe and resilient to any external attack. Recently, QKD transmitters have been successfully tested on CubeSat, enabling QCs for satellite. However, given the requested computation level, the hardware architecture capable to sustain a continuous data generation and transfer requires a multi-core system based on Field Programmable Gate Arrays (FPGAs) capable to implement a provably secure and reconfigurable QKD and fully exploit its potential. The final goal of the project is to develop and build an innovative architectural prototype, suitable for space satellite, integrating resilient reconfiguration capabilities, and validated with radiation beam campaigns.