# Wire and Cable Quality Traceability System Based on Industrial Internet of Things and Blockchain
## 1 Introduction  
The wire and cable industry is regarded as a basic industry of the national economy and plays a vital role in the power system. Wire and cable, as important industrial products, are directly involved in developing the country's economy and people's livelihoods. The wire and cable industry, due to product homogenization, low barriers to entry, low-level duplication of construction, and other reasons, is faced with a chaotic market order, lack of corporate integrity, tampering, product counterfeiting, and other issues; as such, wire and cable companies are often caught up in the issues of shoddy quality, poor sales, and capital constraints, so that counterfeiting and shoddy production seriously restrict the quality improvement of wire and cable products. From the vertical point of view, due to its wide range of brands and varieties, the quality of wire and cable products is difficult to unify [1, 2, 3]. The production and manufacturing process is complex and involves many factors, such as production personnel, equipment, the use of raw materials, etc., which impact the quality of wire and cable. In recent years, the concept of the IIoT has provided favorable ground for the quality traceability of industrial products, and research on traceability has gradually shifted from food and agricultural products to industrial products. With the applications of traceability continuing to deepen, wire and cable quality traceability still faces many problems, suchas the traceability process of data transmission security issues and product production, circulation of quality management, enterprise between \"information island\", and other issues. The IIoT is a network system formed through connection and communication between a large number of items, which realizes intelligent management and decision making for the physical world. In the traditional Internet of Things application solution, the items in each application scenario are closed and autonomously managed due to the technical implementation route, forming an information island. In all closed networks, each item is expressed with an identifier, and the identity resolution service can be used to establish a correlation between each independent item in the Internet of Things to realize the interconnection between things. The blockchain is a distributed ledger technology with the technical characteristics of decentralization, openness, and transparency, distributed storage, immutability, and safety and reliability, among others. It is considered to be a kind of inherent trust machine that can be used to solve the traditional traceability system problems of centralization, trust crises, and others, improving the reliability and security of traceability. Therefore, IIoT identity resolution technology is the key to solving the IIoT information island problem; its advantage lies in data collection and its ability to solve the problem of multi-source heterogeneous data in the cable supply chain through identification and coding specifications and improving the degree of information interaction between enterprises. The advantage of blockchain technology lies in the storage and utilization of data, and its characteristics of information traceability and immutability based on the blockchain can ensure the authenticity, security, and effectiveness of data. Numerous scholars have produced a large amount of research on applying these two technologies in quality traceability. [PERSON] et al. [4] reviewed the application scenarios of the blockchain in the field of intelligent manufacturing. They proposed constructing an open quality system to expand the transparency of industrial product quality. [PERSON] et al. [5] proposed a spinning production data traceability method based on Elasticsearch in order to realize the digital management and data traceability of the whole process of spinning production. [PERSON] et al.