The Design And Implementation Of Community Pension Based On Hyperledger Fabric

With the further deepening of aging,the traditional senior care method can no longer meet the basic condition of China’s aging population,and community senior care has become an important way to solve the problems such as imbalance of supply and demand.Personal information of the elderly in community elderly care is generally stored in third-party data centers by centralized management,which has problems such as difficult data coordination and easily leakage.Institutional organisations in community aged care sometimes also set up data barriers,making it difficult to integrate the service resources of community aged care.Blockchain decentralization,traceability and other characteristics can effectively solve the pain points existing in community elderly care.The specific research work is as follows:First,a PBFT consensus algorithm is proposed based on reputation value evaluation.The traditional PBFT algorithm has the problems of arbitrary selection of master nodes,poor scalability and high communication complexity,which cannot meet the application scenario of community aged care well.Therefore,a reputation value evaluation mechanism is proposeed to evaluate the reputation value of nodes and select the node with the highest reputation value as the master node to achieve a reliable election of master nodes,thus reducing the probability of evil caused by the random selection of master nodes.In addition,to avoid the problems of low efficiency and high latency under large-scale nodes,a two-stage consensus process is designed based on the node reputation evaluation to reduce the communication complexity to about 1/2,which effectively improves the algorithm throughput and reduces the transaction response latency.Experimental results show that the PBFT consensus algorithm based on reputation value evaluation outperforms the traditional PBFT algorithm in terms of throughput,transaction response latency,etc.,satisfies the security and reliability of the algorithm,and can be introduced as a consensus algorithm in community retirement scenarios.Secondly,a community pension system based on blockchain is designed and implements.After completing the scheme design of the community pension system,design the relevant functions of the system according to the needs of the community pension scene.Based on Hyperledger Fabric development platform,we build a community elderly care alliance chain.Among them,the privacy information of the elderly is encrypted using CP-ABE attribute,which improves the flexibility of access while guaranteeing data security.The system consensus algorithm uses the PBFT consensus algorithm based on reputation value evaluation.Smart contracts are written,deployed,and instantiated according to the needs of the community elderly system to ensure reliable data on the chain and effective traceability.Finally,the experimental results shows that the blockchain-based community elderly care system meets the functional requirements of data chain storage and credible traceability,and the system has security and high performance requirements to ensure data credibility,data collaboration and resource integration,and achieves the expected results.