Fine Grained Security Access Control Mechanism Based on Blockchain
To solve the problems of huge data scale,poor access security and privacy security in industrial IoT,a data security ac-cess control mechanism based on blockchain combined with zero-knowledge token is proposed,while IPFS interstellar file system is applied for off-chain storage to expand the storability of blockchain.A blockchain network is built and smart contracts are de-ployed through the Hyperledger Fabric platform to define a formal representation of the access process to achieve local and global access authorization in a more fine-grained model,while the model and process of access control are elaborated.Finally,the securi-ty and effectiveness of the model are compared and analyzed,and the latency of the blockchain network for access authorization is illustrated through experiments.The results show that the proposed mechanism has security,effectiveness and low latency in IoT access control.
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