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Chin. Phys. B, 2018, Vol. 27(10): 100308    DOI: 10.1088/1674-1056/27/10/100308
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Coherent attacks on a practical quantum oblivious transfer protocol

Guang-Ping He(何广平)
School of Physics, Sun Yat-sen University, Guangzhou 510275, China

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:

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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