Abstract
With the rapid growth of spatial crowdsourcing applications, more and more people are benefiting from it. The idea of spatial crowdsourcing is recruiting a set of workers to finish the spatial tasks. Existing worker recruitment mechanisms do not consider the variety requirement, which is easy to meet if the Spatial Crowdsourcing (SC) platform has full knowledge of the data of each worker. Since the SC platform is not fully trusted, workers are concerned about the privacy of their data. To prevent information leaks, workers’ data needs to be specially processed before it can be sent to untrusted platforms for task assignment. The data specially processed by existing privacy-preserving processing methods cannot be used directly to complete such variety tasks with high quality. To solve this problem, we propose a new variety optimization method based on the classical local differential privacy (LDP) mechanism. It can efficiently select the sets of workers with variety of categorical attributes while providing privacy protection for workers. In addition, we also propose a two-step LDP perturbation protocol that can improve the optimization result in the case of uneven distribution of worker attributes. Extensive experiments on synthetic and real datasets show that our methods can efficiently select variety worker subset with better task quality than baseline and close to optimal selection results.
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References
Andrés, M.E., Bordenabe, N.E., Chatzikokolakis, K., Palamidessi, C.: Geo-indistinguishability: differential privacy for location-based systems. In: CCS, pp. 901–914 (2013)
Bordenabe, N.E., Chatzikokolakis, K., Palamidessi, C.: Optimal geo-indistinguishable mechanisms for location privacy. In: CCS, pp. 251–262 (2014)
Duchi, J.C., Jordan, M.I., Wainwright, M.J.: Local privacy and statistical minimax rates. In: FOCS, pp. 429–438 (2013)
Dwork, C.: Differential privacy. In: Bugliesi, M., Preneel, B., Sassone, V., Wegener, I. (eds.) ICALP 2006, Part II. LNCS, vol. 4052, pp. 1–12. Springer, Heidelberg (2006). https://doi.org/10.1007/11787006_1
Fan, J., Zhou, X., Gao, X., Chen, G.: Crowdsourcing task scheduling in mobile social networks. In: Pahl, C., Vukovic, M., Yin, J., Yu, Q. (eds.) ICSOC 2018. LNCS, vol. 11236, pp. 317–331. Springer, Cham (2018). https://doi.org/10.1007/978-3-030-03596-9_22
Kairouz, P., Oh, S., Viswanath, P.: Extremal mechanisms for local differential privacy. J. Mach. Learn. Res. 17, 17:1-17:51 (2016)
Liu, A., et al.: Privacy-preserving task assignment in spatial crowdsourcing. J. Comput. Sci. Technol. 32(5), 905–918 (2017)
Liu, A., et al.: Differential private collaborative web services QoS prediction. World Wide Web 22(6), 2697–2720 (2019)
Tao, Q., Tong, Y., Li, S., Zeng, Y., Zhou, Z., Xu, K.: A differentially private task planning framework for spatial crowdsourcing. In: MDM, pp. 9–18 (2021)
Tao, Q., Tong, Y., Zhou, Z., Shi, Y., Chen, L., Xu, K.: Differentially private online task assignment in spatial crowdsourcing: a tree-based approach. In: ICDE, pp. 517–528 (2020)
Tong, Y., Zhou, Z., Zeng, Y., Chen, L., Shahabi, C.: Spatial crowdsourcing: a survey. VLDB J. 29(1), 217–250 (2020)
Wang, T., Blocki, J., Li, N., Jha, S.: Locally differentially private protocols for frequency estimation. In: USENIX, pp. 729–745 (2017)
Wang, T., Lopuhaä-Zwakenberg, M., Li, Z., Skoric, B., Li, N.: Locally differentially private frequency estimation with consistency. In: NDSS (2020)
Xiao, M., et al.: SRA: secure reverse auction for task assignment in spatial crowdsourcing. IEEE Trans. Knowl. Data Eng. 32(4), 782–796 (2020)
Yuan, D., Li, Q., Li, G., Wang, Q., Ren, K.: Priradar: a privacy-preserving framework for spatial crowdsourcing. IEEE Trans. Inf. Forensics Secur. 15, 299–314 (2020)
Zhai, D., et al.: Towards secure and truthful task assignment in spatial crowdsourcing. World Wide Web 22(5), 2017–2040 (2019)
Zhao, Y., Zheng, K., Cui, Y., Su, H., Zhu, F., Zhou, X.: Predictive task assignment in spatial crowdsourcing: a data-driven approach. In: ICDE, pp. 13–24 (2020)
Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 61572336, 61632016, 62072323), the Natural Science Foundation of Jiangsu Province (Grant Nos. BK20211307, BK20191420), the Major Program of the Natural Science Foundation of Jiangsu Higher Education Institutions of China (Grant Nos. 18KJA520010, 19KJA610002), and the Collaborative Innovation Center of Novel Software Technology and Industrialization.
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Zhang, Z., Liu, A., Liu, S., Li, Z., Zhao, L. (2021). Privacy-Preserving Worker Recruitment Under Variety Requirement in Spatial Crowdsourcing. In: Hacid, H., Kao, O., Mecella, M., Moha, N., Paik, Hy. (eds) Service-Oriented Computing. ICSOC 2021. Lecture Notes in Computer Science(), vol 13121. Springer, Cham. https://doi.org/10.1007/978-3-030-91431-8_19
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DOI: https://doi.org/10.1007/978-3-030-91431-8_19
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