Imperial College London
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Professor Myungshik Kim

Faculty of Natural Sciences, Department of Physics

Chair in Theoretical Quantum Information Sciences
 
 
 
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Contact

 

+44 (0)20 7594 7754m.kim

 
 
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Location

 

1202Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Lie:2021:10.22331/q-2021-03-10-405,
author = {Lie, SH and Kwon, H and Kim, MS and Jeong, H},
doi = {10.22331/q-2021-03-10-405},
journal = {Quantum},
pages = {1--17},
title = {Quantum one-time tables for unconditionally secure qubit- commitment},
url = {http://dx.doi.org/10.22331/q-2021-03-10-405},
volume = {5},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The commodity-based cryptography is an alternative approach to realize conventionally impossible cryptographic primitives such as unconditionally secure bit-commitment by consuming pre-established correlation between distrustful participants. A unit of such classical correlation is known as the one-time table (OTT). In this paper, we introduce a new example besides quantum key distribution in which quantum correlation is useful for cryptography. We propose a scheme for unconditionally secure qubit-commitment, a quantum cryptographic primitive forbidden by the recently proven no-masking theorem in the standard model, based on the consumption of the quantum generalization of the OTT, the bipartite quantum state we named quantum one-time tables (QOTT). The construction of the QOTT is based on the newly analyzed internal structure of quantum masker and the quantum secret sharing schemes. Our qubit-commitment scheme is shown to be universally composable. We propose to measure the randomness cost of preparing a (Q)OTT in terms of its entropy, and show that the QOTT with superdense coding can increase the security level with half the cost of OTTs for unconditionally secure bit-commitment. The QOTT exemplifies an operational setting where neither maximally classically correlated state nor maximally entangled state, but rather a well-structured partially entangled mixed state is more valuable resource.
AU  - Lie,SH
AU  - Kwon,H
AU  - Kim,MS
AU  - Jeong,H
DO  - 10.22331/q-2021-03-10-405
EP  - 17
PY  - 2021///
SN  - 2521-327X
SP  - 1
TI  - Quantum one-time tables for unconditionally secure qubit- commitment
T2  - Quantum
UR  - http://dx.doi.org/10.22331/q-2021-03-10-405
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000628527400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://quantum-journal.org/papers/q-2021-03-10-405/
UR  - http://hdl.handle.net/10044/1/87989
VL  - 5
ER  -
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