Coherent attacks on a practical quantum oblivious transfer protocol

doi:10.1088/1674-1056/27/10/100308

Abstract

In a recent quantum oblivious transfer protocol proposed by Nagy et al., it was proven that attacks based on individual measurements and 2-qubit entanglement can all be defeated. Later we found that 5-body entanglement-based attacks can break the protocol. Here we further tighten the security bound, by showing that the protocol is insecure against 4-body entanglement-based attacks, while being immune to 3-body entanglement-based attacks. Also, increasing the number of qubits in the protocol is useless for improving its security.

Keywords: quantum cryptography quantum algorithm quantum oblivious transfer entanglement

Received: 27 April 2018
Revised: 19 July 2018
Accepted manuscript online:

PACS:	03.67.Dd	(Quantum cryptography and communication security)
	03.67.Ac	(Quantum algorithms, protocols, and simulations)
	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.Hk	(Quantum communication)

Corresponding Authors: Guang-Ping He
E-mail: hegp@mail.sysu.edu.cn

Cite this article:

Guang-Ping He(何广平) Coherent attacks on a practical quantum oblivious transfer protocol 2018 Chin. Phys. B 27 100308

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Coherent attacks on a practical quantum oblivious transfer protocol

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