基于CSBFT区块链的农作物全产业链信息溯源平台设计

为提高农产品溯源信息的完整性、安全性及可信性,该文从农产品产业链角度出发,设计并实现基于区块链的农作物全产业链信息溯源平台。通过研究和分析农作物全产业链中从农资购买到粮食销售的信息流程,设计溯源平台的架构和功能模块。提出一种改进的区块链共识算法:基于信誉监督机制共识算法CSBFT(credit-supervisor byzantine fault tolerance),用以提高联盟链场景下共识机制的安全性和效率;设计并编写智能合约,自动化保存关键上链信息,并生成相应的溯源码供消费者查询。与传统食品追溯系统相比,采用区块链的农作物全产业链信息溯源平台具有去中心化及信息完整性、安全性、真实性和可靠性更高的优点;与现有基于区块链的食品溯源平台相比,CSBFT算法使得本平台在信息上链时具有更高的安全性和更小的时延。

Design and implementation of information tracing platform for crop whole industry chain based on CSBFT-Blockchain

The safety of agricultural products concerns people''s health. To ensure food safety and accountability, it is crucial to establish a credible food traceability system. The blockchain technology can greatly improve the integrity, security and credibility of traceability information of traditional agricultural product traceability system, thanks to its properties such as decentralization, non-tamperability and information traceability. This paper proposes an improved blockchain consensus algorithm, based on the Credit-Supervisor Byzantine Fault Tolerance (CSBFT). It mainly includes credit update strategy and supervisor node selection strategy. Various credit update strategies are formulated according to the node types and whether they can actively forward a message, and then the supervisor node selection strategies are made based on the credit of the node. The CSBFT algorithm uses the supervisor to monitor the behavior of the master node to prevent problems such as sending different messages to different nodes; while the consensus mechanism of centralized nodes and distributed nodes can improve the supervisory node generating efficiency because the master node does not need to be generated cyclically and it can choose a more reliable node as a supervisory node according to the supervisory node selection strategy. To prove the effectiveness of CSBFT algorithm, the paper uses the common transfer transaction information as experimental data and the experiments were repeated ten times to compare the consensus delays of PBFT (Practical Byzantine Fault Tolerance), MBFT and CSBFT with the transaction numbers of 5, 10, 20 and 50 respectively. The average of 10 repeated experiments is used as the final statistical value and the result proves that CSBFT has higher robustness, lower consensus delay and higher safety. This paper studied and analyzed the information flow of the whole industrial chain of crops from agricultural product purchase, planting management, processing and production, logistics and transportation to grain sales, to build a blockchain alliance chain based on CSBFT. It analyzed, designed and realized the whole industrial chain information traceability platform based on embedded CSBFT, via object-oriented software engineering method. The platform can automatically save the key up-chain information through pre-designed smart contracts to generate corresponding traceability codes for consumers to query. Compared with the traditional food traceability system, the CSBFT algorithm endows the platform with higher security and less delay in information chaining. Future research on data privacy protection will be conducted. To protect the data privacy, users of various levels in the whole industrial chain hesitate to share their data. Therefore, how to collect and share the information without leaking the private data is the future research direction.