Anonymous privacy-preserving task matching in crowdsourcing

• Main Authors: SHU, Jiangang, LIU, Ximeng, JIA, Xiaohua, YANG, Kan, DENG, Robert H.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2018
• Subjects: Anonymity; crowdsourcing; privacy; revocation; task matching; traceability; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/4150; https://ink.library.smu.edu.sg/context/sis_research/article/5154/viewcontent/Anonymous_Privacy_Preserving_Task_Matching_2018.pdf
• Institution: Singapore Management University

With the development of sharing economy, crowdsourcing as a distributed computing paradigm has become increasingly pervasive. As one of indispensable services for most crowdsourcing applications, task matching has also been extensively explored. However, privacy issues are usually ignored during the task matching and few existing privacy-preserving crowdsourcing mechanisms can simultaneously protect both task privacy and worker privacy. This paper systematically analyzes the privacy leaks and potential threats in the task matching and proposes a single-keyword task matching scheme for the multirequester/multiworker crowdsourcing with efficient worker revocation. The proposed scheme not only protects data confidentiality and identity anonymity against the crowd-server, but also achieves query traceability against dishonest or revoked workers. Detailed privacy analysis and thorough performance evaluation show that the proposed scheme is secure and feasible.