A Semi-Quantum Private Comparison Base on W-States

Abstract

Privacy comparison is an important research topic in secure multi-party computing, widely used in e-commerce, secret ballots, and other fields. However, the development of quantum computing power poses a growing potential security threat to secure multi-party algorithms based on mathematically tricky problems, and most of the proposed quantum privacy comparison schemes could be more efficient. Therefore, based on the W-state, we offer a more efficient semi-quantum privacy comparison method. The security analysis shows that the scheme can resist third-party, measurement, and entanglement attacks. Compared with the previous work, the scheme significantly improves communication efficiency and has stronger practicability.

Efficient Quantum Private Comparison Based on GHZ States

“…Quantum superdense coding is utilized to achieve higher efficiency. Since then, several QPC protocols have been proposed, utilizing various quantum resources such as single photons [8][9][10][11], entangled states [12][13][14][15][16][17][18][19][20][21], and cluster states [22][23][24][25][26]. Additionally, two-atom product states and single-atom measurements are used in a QPC protocol [27].…”