Problem Statement
The project addresses the integration of hybrid classical/quantum encryption and time transfer functionalities within the same physical channel. Challenges include performance limitations of core technologies, such as the photonic integrated circuit entangled photon-pair source, and the classical information layer of the network. The consortium seeks to answer questions about the use of physically-unclonable functions for authentication purposes of the communicating parties and the classical infrastructure that supports bi-directional transmission of entangled photons. This involves a joint effort to solve the limitations of classical networks, coexistence of quantum and classical signals, and deployment in realistic free-space channels.
Technical approach
Fundamental research will be performed to demonstrate the interaction between classical and quantum encryption in a bi-directional coexisting channel using PIC-based sources. It aims to create two nodes and evaluate quantum time transfer and QKD performance over optical fibre and free-space connections. The nodes will use PIC sources, time-reference modules, time taggers, and single-photon detectors. Quantum time transfer will be performed based on the photon-photon correlation data, while classical communication will use PUF-protected encryption. Automation of measurements and data analysis will be implemented. The final step is a field test to demonstrate operation in realistic conditions.
Expected Results
The consortium will deliver a functional bi-directional coexisting network for continuous authentication, encryption, and time transfer based on classical and quantum methodologies. The outcome will impact potential users' perspectives on next-generation quantum communication systems. The project will contribute to the KiQQer vision architecture, fitting into designs for Dutch quantum communication infrastructure and the Quantum Internet Alliance. Expected tangible results include data rate analysis, secret key generation rate, quantum time transfer precision, data management protocol, updated results of data rate using PUFs, hybrid network management structure, field test execution, and an article reporting on project outcomes.