Abstract:

In view of the security and privacy protection issues faced in sharing sensing information data between sensing devices in the internet of things, this study proposes a blockchain-based multi-domain data sharing mechanism. The mechanism treats the data sharing problem as a data transaction problem and introduces a trusted regulator to guarantee the interests of both buyers and sellers of the transaction. The mechanism provides a data publishing method in which buyers can securely publish data to a cloud storage service and do not disclose information about the data during the publishing process. A ring signature is used to sign and verify the buyer's licence in order to protect the buyer's privacy from being compromised during the data transaction. In addition, the mechanism provides an anonymous evaluation method that allows buyers to evaluate transactions and monitor seller behaviour without revealing their identity. The security analysis and simulation experiments results show that the mechanism is secure and efficient, meets the requirements for secure data sharing in the internet of things.

Key words: internet of things, blockchain, sensor network, data sharing, data trading, privacy protection, anonymous comments, data security