  Quantum computing is a promising paradigm to solve computationally
intractable problems. Various companies such as, IBM, Rigetti and D-Wave offer
quantum computers using a cloud-based platform that possess several interesting
features. These factors motivate a new threat model. To mitigate this threat,
we propose two flavors of QuPUF: one based on superposition, and another based
on decoherence. Experiments on real IBM quantum hardware show that the proposed
QuPUF can achieve inter-die Hamming Distance(HD) of 55% and intra-HD as low as
4%, as compared to ideal cases of 50% and 0% respectively. The proposed QuPUFs
can also be used as a standalone solution for any other application.
