eng
Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Leibniz International Proceedings in Informatics
1868-8969
2020-08-19
12:1
12:15
10.4230/LIPIcs.TQC.2020.12
article
A Device-Independent Protocol for XOR Oblivious Transfer
Kundu, Srijita
1
Sikora, Jamie
2
Tan, Ernest Y.-Z.
3
https://orcid.org/0000-0003-4872-158X
Centre for Quantum Technologies, National University of Singapore, Singapore
Perimeter Institute for Theoretical Physics, Waterloo, Ontario, Canada
Institute for Theoretical Physics, ETH Zürich, Switzerland
Oblivious transfer is a cryptographic primitive where Alice has two bits and Bob wishes to learn some function of them. Ideally, Alice should not learn Bob’s desired function choice and Bob should not learn any more than logically implied by the function value. While decent quantum protocols for this task are known, many quickly become insecure if an adversary were to control the quantum devices used in the implementation of the protocol. Here we present how some existing protocols fail in this device-independent framework, and give a fully-device independent quantum protocol for XOR oblivious transfer which is provably more secure than any classical protocol.
https://drops.dagstuhl.de/storage/00lipics/lipics-vol158-tqc2020/LIPIcs.TQC.2020.12/LIPIcs.TQC.2020.12.pdf
Quantum cryptography
device independence
oblivious transfer
semidefinite programming
security analysis