Q-Bird from Delft develops scalable security for the quantum era

Traditional quantum key distribution (QKD) security is point-to-point, requiring a direct fiber-optic connection between two end users to establish a secure link. Connecting twenty users would require twenty separate fiber-optic cables. If each of those users wanted to connect securely with another twenty users, they would each need another twenty physical cables.

Q-Bird’s multipoint-to-multipoint QKD network simplifies this: with just one physical connection to their central hub, the MQX4000, and the Falqon MQS4000 quantum switch, users can establish a secure connection with any other user linked to the same hub. To add a new user, one simply connects a new end node to the network. A network with dozens or even hundreds of users is theoretically possible.