TY - JOUR
T1 - Probabilistic one-time programs using quantum entanglement
AU - Roehsner, Marie Christine
AU - Kettlewell, Joshua A.
AU - Fitzsimons, Joseph
AU - Walther, Philip
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85108163516&partnerID=8YFLogxK
U2 - 10.1038/s41534-021-00435-w
DO - 10.1038/s41534-021-00435-w
M3 - Article
AN - SCOPUS:85108163516
VL - 7
JO - NPJ Quantum Information
JF - NPJ Quantum Information
SN - 2056-6387
IS - 1
M1 - 98
ER -