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Quantum Data Locking for Secure Communication against an Eavesdropper with Time-Limited Storage

Author(s)
Lupo, Cosmo
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Abstract
Quantum cryptography allows for unconditionally secure communication against an eavesdropper endowed with unlimited computational power and perfect technologies, who is only constrained by the laws of physics. We review recent results showing that, under the assumption that the eavesdropper can store quantum information only for a limited time, it is possible to enhance the performance of quantum key distribution in both a quantitative and qualitative fashion. We consider quantum data locking as a cryptographic primitive and discuss secure communication and key distribution protocols. For the case of a lossy optical channel, this yields the theoretical possibility of generating secret key at a constant rate of 1 bit per mode at arbitrarily long communication distances.
Date issued
2015-05
URI
http://hdl.handle.net/1721.1/98189
Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Journal
Entropy
Publisher
MDPI AG
Citation
Lupo, Cosmo. “Quantum Data Locking for Secure Communication Against an Eavesdropper with Time-Limited Storage.” Entropy 17, no. 5 (May 2015): 3194–3204.
Version: Final published version
ISSN
1099-4300

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