Block-DDT: A Blockchain-Empowered IoT Device Data Trading Scheme in Cloud Computing
Xu Yang · 2024
The rapid growth of IoT devices generates valuable data. However, current centralized IoT device data trading solutions pose privacy and security risks. Emerging blockchain technology aims to address these issues by decentralizing data trading, reducing the risk of single points of failure, and enhancing user control over their data. In this paper, we propose a new blockchain-empowered IoT device data trading scheme, Block-DDT, to achieve secure and efficient IoT device data trading by combining privacy computing technology in each module to protect user identity and transaction information, while protecting user data privacy and ensuring transaction availability. We first design a distributed identity management module that utilizes DID to establish anonymous associations to protect user privacy and data ownership. Then we propose a matching module to automatically match owners and consumers through smart contracts. Furthermore, we customize a data transaction module that utilizes threshold cryptography primitives to support the data management committee in completing encrypted data offline transactions in a consensus form. Finally, we evaluate Block-DDT through experimental analysis to confirm its efficiency.