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At present, the previous quantum private comparison (QPC) protocols always employ maximally entangled states as quantum resource, which are harder to prepare than pure entangled states. In this paper, by using two-particle pure entangled states as quantum resource, one novel QPC protocol is constructed, which is easy to implement in reality with present quantum technologies. The proposed protocol needs neither unitary operations nor quantum entanglement swapping but single-particle measurements. The proposed protocol is secure against both the outside attack and the participant attack. [ABSTRACT FROM AUTHOR]

A two-party quantum private comparison (QPC) protocol is constructed with χ-type entangled states in this paper. The proposed protocol employs a semi-honest third party (TP) that is allowed to misbehave on his own but cannot conspire with the adversary. The proposed protocol need perform Bell basis measurements and single-particle measurements but neither unitary operations nor quantum entanglement swapping technology. The proposed protocol possesses good security toward both the outside attack and the participant attack. TP only knows the comparison result of the private information from two parties in the proposed protocol. [ABSTRACT FROM AUTHOR]