The three academic partners in this proposal, in association with a startup company, propose to demonstrate theoretically and experimentally the possibility to integrate a proprietary technology for Quantum Key Distribution (QKD) on a “photonic chip”, by using the quickly developing Silicon Photonics technologies. The practical QKD implementation will be based on Quantum Continuous Variables (CVQKD), which has been developed and patented by two partners of the project, LCF and LTCI. The third partner, IEF, has international expertise in the domain of Silicon Photonics. The questions to be addressed range from fundamental issues (e.g. choice of a suitable QKD protocol, and associated security proof) to more applied ones (e.g. design and optimization of the appropriate photonics components). It will also stimulate progress of Silicon Photonics technologies, in the direction of more efficient and low-loss optical components. The start-up company SeQureNet is interested in carrying out some specific aspects of the research, and – in the long run – in exploiting its outcomes. If successful, the project may open entirely new perspectives for QKD, by reducing the price and size of devices by several orders of magnitude.