Lightweight Scheme for Crowd Sensing Based on Blockchain
Crowd Sensing,as a sustainable and cost-effective data collection method,is widely used in scenarios of large-scale data collection and analysis.The integration of blockchain technology and crowd sensing systems can decentralize crowd sensing systems and effectively secure sensed dates.However,the unique verification and storage mechanisms of the blockchain often cause network con-gestion and excessive storage pressure,resulting in low processing efficiency of the crowd sensing sys-tem.To address these issues,this paper proposes a lightweight crowd sensing solution based on block-chain.This solution uses the Paillier homomorphic encryption algorithm encryption algorithm to en-crypt the sensed data,then uses the BLS algorithm for signing and aggregation.The encrypted transac-tions that pass the verification are saved on IPFS with an index value for on-chain storage generated automatically Through empirical verification,this solution improves the identity verification efficiency of sensing users and reduces the storage pressure of the blockchain system,while ensuring user identity and data privacy.
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