| Summary: | In the Cyber-Physical system(CPS), equipment generates a large amount of communication information and equipment data during the operation of the system, which are at risk of being modified and stolen. Block chain technology with distributed storage as the core is conducive to ensuring the data security of CPS system, but the existing consensus algorithms have the problem that data recording rights are concentrated in a few nodes and are easy to be hijacked by malicious nodes. By introducing node validity, the dynamic change of node behavior can be reflected. The experimental results show that the consensus mechanism based on the validity of nodes makes the distribution of nodes with access to data records more decentralized, better reflects the de-centralization characteristics of the system, and improves the security of data.
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