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Quantum computing is under rapid development, and today there are severalcloud-based, quantum computers (QCs) of modest size (>100s of physical qubits).Although these QCs, along with their highly-specialized classical supportinfrastructure, are in limited supply, they are readily available for remoteaccess and programming. This work shows the viability of using intrinsicquantum hardware properties for fingerprinting cloud-based QCs that existtoday. We demonstrate the reliability of intrinsic fingerprinting with real QCcharacterization data, as well as simulated QC data, and we detail a quantumphysically unclonable function (Q-PUF) scheme for secure key generation usingunique fingerprint data combined with fuzzy extraction. We use fixed-frequencytransmon qubits for prototyping our methods.

Trustworthy Quantum Computation through Quantum Physical Unclonable Functions