Vol.3, No.2, 2021, pp.45-54, doi:10.32604/jqc.2021.019675
New Quantum Private Comparison Using Hyperentangled GHZ State
  • Jerrel Gianni1, Zhiguo Qu2,*
1 College of International Students, Nanjing University of Information Science and Technology, Nanjing, 210044, China
2 School of Computer and Software, Nanjing University of Information Science and Technology, Nanjing, 210044, China
* Corresponding Author: Zhiguo Qu. Email:
Received 15 April 2021; Accepted 10 May 2021; Issue published 22 June 2021
In this paper, we propose a new protocol designed for quantum private comparison (QPC). This new protocol utilizes the hyperentanglement as the quantum resource and introduces a semi-honest third party (TP) to achieve the objective. This protocol’s quantum carrier is a hyperentangled three-photon GHZ state in 2 degrees of freedom (DOF), which could have 64 combinations. The TP can decide which combination to use based on the shared key information provided from a quantum key distribution (QKD) protocol. By doing so, the security of the protocol can be improved further. Decoy photon technology is also used as another means of security and checks if the transmission in the quantum channel is secure or not before sending the quantum carrier. The proposed protocol is proved to be able to fend off various kinds of eavesdropping attacks. In addition, the new QPC protocol also can compare secret inputs securely and efficiently.
GHZ state; hyperentangled state; information security; quantum cryptography; quantum private comparison
Cite This Article
. , "New quantum private comparison using hyperentangled ghz state," Journal of Quantum Computing, vol. 3, no.2, pp. 45–54, 2021.
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