Description
Future quantum information systems will increasingly rely on remote processors, distributed data, and hybrid quantum-classical workflows. As access to quantum hardware moves from dedicated laboratories to cloud platforms and shared infrastructure, trust becomes both a scientific and engineering challenge: how can a user know that a remote quantum processor is the device it claims to be, and how can distributed parties efficiently verify that their data remain consistent as systems evolve?
In this talk we develop the idea of quantum trust across multiple layers of quantum information systems. At the physical layer, intrinsic signatures of quantum processors can be used to construct Quantum Physical Unclonable Functions (Q-PUFs) [1], turning stable hardware features such as qubit-frequency fingerprints into challenge-response mechanisms for device authentication. Q-PUFs provide a hardware-rooted starting point for trust in networked and cloud-accessed quantum technologies. However, future trustworthy quantum systems will require more than device identity alone: they will also need mechanisms for verifying information integrity, consistency, and reliable operation at higher logical layers.
To address this broader challenge, we present Supercheq [2], a family of quantum fingerprinting protocols for communication-efficient equivalence checking in distributed databases. Supercheq enables compact comparison of large files and supports incremental fingerprint updates as data change, reducing the overhead of verification in dynamic information systems. Together, Q-PUFs and Supercheq point toward the concept of a Logical Q-PUF: a trust primitive that extends beyond physical hardware authentication to include higher-layer validation of encoded information, logical processes, and distributed quantum-classical workflows. This provides a pathway from authenticating quantum devices toward verifying trustworthy behaviour in future quantum information systems.
[1] B. Tonekaboni et. al. , Building Trust in the Quantum Cloud with Physical Unclonable Functions arXiv:2311.07094
[2] E. R. Anschuetz et. al, SupercheQ: Quantum Advantage for Distributed Databases arXiv:2212.03850
| I am the presenting author | Yes |
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