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Smart city article details
| Title | Pp-Mad: Privacy-Preserving Multi-Task Data Aggregation In Mobile Crowdsensing Via Blockchain |
|---|---|
| ID_Doc | 42591 |
| Authors | Yan X.; Ding J.; Luo F.; Gong Z.; Ng W.W.Y.; Luo Y. |
| Year | 2025 |
| Published | Computer Standards and Interfaces, 94 |
| DOI | http://dx.doi.org/10.1016/j.csi.2025.104002 |
| Abstract | In smart city, multi-task data aggregation has become a key method for extracting useful information from massive sensing data generated by concurrent mobile crowdsensing tasks from multiple task requesters. In such multi-requester and multi-task scenario, each task requester wants to protect the privacy of their own aggregation results. Thus, protecting privacies of both workers and task requesters pose a significant challenge for multi-task data aggregation. Most existing privacy-preserving data aggregation methods focus on single-requester scenarios. When applied to multi-task and multi-requester aggregation, existing methods are inefficient due to completing repeatedly each task and fail to safeguard the privacy of each task requester. Additionally, existing multi-task data aggregation schemes do not support multiple types of aggregation. To tackle these challenges, we propose PP-MAD, a multi-type and privacy-preserving multi-task data aggregation scheme based on blockchain for mobile crowdsensing. PP-MAD is able to aggregate multiple concurrent tasks from multiple task requesters, and it supports many types of data aggregation, including sum, mean, variance, weighted sum, weighted mean. Moreover, PP-MAD ensures privacies of workers’ data and aggregation results of each task requester, even under collusion attacks. A detailed security analysis verifies that PP-MAD is both secure and privacy-preserving. Furthermore, experimental results and theoretical analyses of both computation and communication costs demonstrate our scheme is efficient. © 2025 |
| Author Keywords | Chinese Remainder Theorem; Mobile crowdsensing; Privacy preserving; Secure aggregation |
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