A robust and efficient quantum private comparison of equality based on the entangled swapping of GHZlike state and χ+ state

2^nd International Conference on Astrophysics and Particle Physics

November 13-15, 2017 San Antonio, USA

Zhiwen Zhao and Ling Xu

Beijing Normal University, China

Posters & Accepted Abstracts: J Astrophys Aerospace Technol

Abstract :

A new quantum protocol with the assistance of a semi-honest third party (TP) is proposed, which allows the participants comparing the equality of their private information without disclosing them. Different from previous protocols, this protocol utilizes quantum key distribution against the collective-dephasing noise and the collective-rotation noise, which is more robust and abandons few samples, to transmit the classical information. In addition, this protocol utilizes the GHZ-like state and the �?+ state to produce the entanglement swapping. And the Bell basis and the dual basis are used to measure the particle pair so that 3 bits of each participant's private information can be compared in each comparison time, which is more efficient and consumes fewer comparison times. Meanwhile, there is no need of unitary operation and hash function in this protocol. At the end, various kinds of outside attack and participant attack are discussed and analyzed to be invalid, so it can complete the comparison in security.