Carrousel Digital markets and promotes intellectual property on systems doing entangled photon based data and quantum transmission, passive photonic router, quantum secure One-Time-Key e-signatures files protection, and internet resilient e-cash. Our range of IP extends to mundane process and designs such as indoor secure geo-localization, over the internet One-Time-Key distribution circuits for flash memory controllers protecting against illicit upgrades by erasing One-Time-Keys upon unexpected tempering, and protection of displays against third party viewing. Our solutions bring an unprecedented level of security, and scope and speed to the data transmission industry. They also cover a large spectrum of innovation enabling quantum safe large scale e-cash and e-identity deployment. Patenting our IP, we can expose in plain words what our innovations are and leave their realisation to existing manufacturers. The patenting documents may include some implementation cases in addition to those advertised above or on our website.