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Title: Probabilistic one-time programs using quantum entanglement
Authors: Roehsner, Marie-Christine
Kettlewell, Joshua A.
Fitzsimons, Joseph 
Walther, Philip
Issue Date: 15-Jun-2021
Publisher: Nature Research
Citation: Roehsner, Marie-Christine, Kettlewell, Joshua A., Fitzsimons, Joseph, Walther, Philip (2021-06-15). Probabilistic one-time programs using quantum entanglement. npj Quantum Information 7 (1) : 98. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Quantum technology allows for unparalleled levels of data and software protection. Probabilistic one-time programs harness these capabilities for quantum-assisted classical computations by encoding classical software in small quantum states resulting in computer programs that can be used only once. Such self-destructing one-time programs facilitate a variety of applications reaching from software distribution to one-time delegation of signature authority. Whereas previous experiments demonstrated the feasibility of such schemes, the practical applications were limited. Here we present an improved protocol for one-time programs that resolves major drawbacks of previous schemes, by employing entangled qubit pairs. This results in four orders of magnitude higher count rates and the ability to execute a program long after the quantum information exchange has taken place. We implement a one-time delegation of signature authority over an underground fiber link between university buildings in downtown Vienna, emphasizing the compatibility of our scheme with prepare-and-measure quantum internet networks. © 2021, The Author(s).
Source Title: npj Quantum Information
ISSN: 2056-6387
DOI: 10.1038/s41534-021-00435-w
Rights: Attribution 4.0 International
Appears in Collections:Staff Publications

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