Long-distance free-space quantum cryptography

Kurtsiefer, Christian; Zarda, P.; Halder, M.; Gorman, P.M.; Tapster, P R; Rarity, John; Weinfurter, Harald

doi:10.1117/12.483036

Cited by 39 publications

(20 citation statements)

References 11 publications

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“…Hughes et al [2002] then demonstrated free-space QKD over 10 km. Free-space QKD over the largest distance so far was performed by the Munich group of H. Weinfurter (Kurtsiefer et al [2002a], Kurtsiefer et al [2002b]). Unlike the other groups, they moved to the high altitudes of the Alps to take advantage of thinner air and less air turbulence.…”

Section: Polarization Encodingmentioning

confidence: 99%

Quantum cryptography

2006

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Section: Polarization Encodingmentioning

confidence: 99%

Quantum cryptography

2006

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“…The theoretical properties of quantum information-processing and the feasibility of quantum communication in practical situations have been already elucidated by many experiments carried out in laboratories on the ground. In particular, recent advances in free-space experiments have allowed to achieve single-photon QKD over distances up to 23 km 10,11 and the distribution of entangled photon pairs over 600 m (Aspelmeyer et al 12 ) using optical telescopes. In the long run, the application of space and astronomical technologies to quantum communication will enable further significant increases of these distances.…”

Section: Single Photon Quantum Communicationmentioning

confidence: 99%

Space-to-ground quantum communication using an optical ground station: a feasibility study

Villoresi

Tamburini

Aspelmeyer

et al. 2004

Quantum Communications and Quantum Imaging II

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We have tested the experimental prerequisites for a Space-to-Ground quantum communication link between satellites and an optical ground station. The feasibility of our ideas is being assessed using the facilities of the ASI Matera Laser Ranging Observatory (MLRO). Specific emphasis is put on the necessary technological modifications of the existing infrastructure to achieve single photon reception from an orbiting satellite.

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“…A half-wave plate before one of the PBS rotates the polarization by 451. This detection setup was used in a number of QKD demonstrations [33][34][35] .…”

Section: Methodsmentioning

confidence: 99%

Experimental implementation of bit commitment in the noisy-storage model

et al. 2012

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Fundamental primitives such as bit commitment and oblivious transfer serve as building blocks for many other two-party protocols. Hence, the secure implementation of such primitives is important in modern cryptography. Here we present a bit commitment protocol that is secure as long as the attacker's quantum memory device is imperfect. The latter assumption is known as the noisy-storage model. We experimentally executed this protocol by performing measurements on polarization-entangled photon pairs. Our work includes a full security analysis, accounting for all experimental error rates and finite size effects. This demonstrates the feasibility of two-party protocols in this model using real-world quantum devices. Finally, we provide a general analysis of our bit commitment protocol for a range of experimental parameters.

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Long-distance free-space quantum cryptography

Cited by 39 publications

References 11 publications

Quantum cryptography

Quantum cryptography

Space-to-ground quantum communication using an optical ground station: a feasibility study

Experimental implementation of bit commitment in the noisy-storage model

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