Chun-Wei Yang, Yu-Yun Huang, Jason Lin, Chia-Wei Tsai
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引用次数: 0
Abstract
This study identifies a participant attack vulnerability in Li et al.’s SQPC protocol. The participant attack allows a malicious participant, Bob, to obtain the participant Alice’s secret information by intercepting and measuring photons sent to Alice, and later decrypting Alice’s encrypted comparison result. An improved SQPC protocol is proposed to address this problem. The key enhancement is introducing a mutual eavesdropping check requiring the third party and participants to verify they obtain the same photon measurement results. This enables detecting participant attacks like the one identified. The SQPC protocol proposed in this study not only withstands attacks from internal participants but also achieves quantum efficiency almost equivalent to Li et al.’s SQPC protocol. Thus, this study presents a more secure SQPC protocol without compromising quantum efficiency.
期刊介绍:
This letters journal, launched in 1986, consists of research papers covering current research developments in Gravitation, Cosmology, Astrophysics, Nuclear Physics, Particles and Fields, Accelerator physics, and Quantum Information. A Brief Review section has also been initiated with the purpose of publishing short reports on the latest experimental findings and urgent new theoretical developments.