Quantum Bridge Technologies Inc.

Published purpose

Existing key management systems using Quantum Key Distribution (QKD) technology are based on trusted relays in order to overcome the distance limitations of QKD solutions. This approach has a strong drawback: the attack surface of these systems is proportional to the number of the nodes, as a single compromised relay can potentially learn the keys of all users. This project will implement a different approach to integrate Twin-Field (TF) QKD in scalable infrastructure, by relying on a distributed trust architecture named Distributed Symmetric Key Exchange (DSKE). The combination of DSKE and TF-QKD allows to build a scalable network, called DSKE Net, without using trusted relays, and providing information-theoretic secure communication on a global scale. Importantly, DSKE Net will also be compatible with other Quantum Key Distribution technologies, allowing interoperability and boosting adoption.