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arXiv · 1905.02763

Authenticated teleportation with one-sided trust

Anupama Unnikrishnan·Damian Markham
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Abstract

We introduce a protocol for authenticated teleportation, which can be proven secure even when the receiver does not trust their measurement devices, and is experimentally accessible. We use the technique of self-testing from the device-independent approach to quantum information, where we can characterise quantum states and measurements from the exhibited classical correlations alone. First, we derive self-testing bounds for the Bell state and Pauli $σ_X, σ_Z$ measurements, that are robust enough to be implemented in the lab. Then, we use these to determine a lower bound on the fidelity of an untested entangled state to be used for teleportation. Finally, we apply our results to propose an experimentally feasible protocol for one-sided device-independent authenticated teleportation. This can be interpreted as a first practical authentication of a quantum channel, with additional one-sided device-independence.

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Anupama Unnikrishnan, Damian Markham. 2019-09-10. Authenticated teleportation with one-sided trust. https://doi.org/10.1103/physreva.100.032314

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