Comment on “quantum oblivious transfer: a secure practical implementation”

Comment on “quantum oblivious transfer: a secure practical implementation” We study the entanglement-based attack on a recently proposed quantum oblivious transfer (OT) protocol (Nagy and Nagy in Quantum Inf Process 15:5037, 2016). While in secure OT, Bob’s probability of obtaining Alice’s secret bit unambiguously should be limited to $$50\%$$ 50 % , we show that if Bob has the technology to handle 5-body entangled states in the current protocol, then he can increase this probability to $$64.6\%$$ 64.6 % . More importantly, in contrast to what the authors claimed, increasing the number of qubits used in the protocol cannot increase the hardness of Bob’s attack. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Comment on “quantum oblivious transfer: a secure practical implementation”

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-017-1548-4
Publisher site
See Article on Publisher Site

Abstract

We study the entanglement-based attack on a recently proposed quantum oblivious transfer (OT) protocol (Nagy and Nagy in Quantum Inf Process 15:5037, 2016). While in secure OT, Bob’s probability of obtaining Alice’s secret bit unambiguously should be limited to $$50\%$$ 50 % , we show that if Bob has the technology to handle 5-body entangled states in the current protocol, then he can increase this probability to $$64.6\%$$ 64.6 % . More importantly, in contrast to what the authors claimed, increasing the number of qubits used in the protocol cannot increase the hardness of Bob’s attack.

Journal

Quantum Information ProcessingSpringer Journals

Published: Feb 24, 2017

References

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