中圖分類號：TP309.2 文獻標志碼：A DOI: 10.16157/j.issn.0258-7998.234507
中文引用格式： 李惟佳，李軍義，龔志茂，等. 空間眾包中一種支持高效任務分配的隱私保護方案[J]. 電子技術應用，2024，50(3)：66-72.
英文引用格式： Li Weijia，Li Junyi，Gong Zhimao，et al. A privacy-preserving scheme supporting efficient task assignment in spatial crowdsourcing[J]. Application of Electronic Technique，2024，50(3)：66-72.

A privacy-preserving scheme supporting efficient task assignment in spatial crowdsourcing

Abstract： The location leakage problem in spatial crowdsourcing has attracted a lot of attention from academia and industry in recent years. Facing this challenge, some privacy-preserving schemes have been proposed to protect the location information of participants in task assignment. However, these schemes have limitations in terms of efficiency. To address this problem, an efficient privacy-preserving scheme is proposed in this paper, in which a grid-index Quadtree structure is used to achieve efficient and stable task assignment and a symmetric hidden vector encryption algorithm is employed to protect the privacy of participants. Extensive simulation experiments based on a real dataset show that the scheme can support efficient task assignment services.

Key words : spatial crowdsourcing；privacy-preserving；searchable encryption；task assignment