IoT information sharing security mechanism based on blockchain technology

The blockchain is the first distributed recording system with its own trust mechanism. It builds a reliable architecture for decentralized control through multi-node information redundancy. Based on this, this paper proposes lightweight IoT information sharing security framework based on blockchain technology. The framework adopts a double-chain model combining data blockchain and transaction blockchain: distributed storage and tamper-proof of data in the data blockchain, and improved by the improved practical Byzantine fault-tolerant (PBFT) mechanism consensus algorithm. Data registration efficiency; resource and data transactions in the transaction blockchain is improved transaction efficiency and privacy protection through improved algorithms based on partial blind signature algorithms. A dynamic game method of node cooperation is proposed to prevent malicious behavior of local dominance. The state of the unknown node is estimated by reporting the node's institutional reputation value; the high-trust reference report is used to correct the weight of the malicious node in the overall report and node merging, and finally reach the Bayesian equilibrium. Finally, the simulation experiment department carried out verification analysis on the anti-attack capability, double-strand processing capability and delay. The results show that the framework is safe, effective and feasible, and it is feasible to verify the location information of the system for secure storage devices. (C) 2019 Elsevier B.V. All rights reserved.