Improved Blockchain Commodity Traceability System Using Distributed Hash Table

The problem of supply chain management erodes trust of consumer and cause huge economic loss. It's essential to track and authenticate every step of supply chain to solve the problem of trust. The traditional centralized storage system has the problem of tamperability so that it can't ensure that data is reliable when consumers query them. Using blockchain technology to store data can solve part of trust problems of tracing system. It ensures that stored data is unalterable, that is, the original data cannot be wiped out. This paper designs a traceability system using blockchain technology. According to the characteristics of supply chain, the distributed hash table is used to improve the storage structure, reduce the load of network and nodes, and improve the storage utilization.