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Chin. Phys. B, 2026, Vol. 35(7): 070306    DOI: 10.1088/1674-1056/ae7274
GENERAL   Next  

Three-party semi-quantum dialogue enhanced with Grover’s algorithm based encoding and hypergraph access control

Rui Tao(陶瑞), Jin-Zhe Jiang(蒋晋喆), and Zhi-Hua Zhang(章志华)†
School of Cyber Science and Engineering, Nanjing University of Science & Technology, Jiangyin 214400, China
Abstract  We introduce a new three-party semi-quantum dialogue (3P-SQD) protocol that combines GHZ-state-based semi-quantum communication, a Grover's algorithm-driven 2-bit encoding scheme, and hypergraph-based access control. In each round, the fully quantum participant Alice sends two bits, whereas the semi-quantum participants Bob and Charlie, restricted to semi-quantum operations such as measurements in the computational basis and reflection, each transmit one bit. The protocol incorporates probe state checking, Grover's algorithm-based encoding, and hypergraph-based authorization. It achieves information-theoretic security and controlled access, while preserving high message throughput and imposing no additional requirements on the semi-quantum users.
Keywords:  semi-quantum dialogue      Grover's algorithm based encoding      hypergraph access structure      quantum communication  
Received:  03 February 2026      Revised:  24 May 2026      Accepted manuscript online:  26 May 2026
PACS:  03.67.-a (Quantum information)  
  03.67.Ac (Quantum algorithms, protocols, and simulations)  
  03.67.Hk (Quantum communication)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12201300) and the Nanjing University of Science and Technology Undergraduate Innovation Training Program (Grant No. S202510288017).
Corresponding Authors:  Zhi-Hua Zhang     E-mail:  zhzhang@njust.edu.cn

Cite this article: 

Rui Tao(陶瑞), Jin-Zhe Jiang(蒋晋喆), and Zhi-Hua Zhang(章志华) Three-party semi-quantum dialogue enhanced with Grover’s algorithm based encoding and hypergraph access control 2026 Chin. Phys. B 35 070306

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