Food is the world’s priority for the people, and food safety issues have always been plagued. Traceability is one of the powerful means to ensure food safety. However, traditional food traceability has disadvantages such as imperfect systems, inadequate control, and insufficient application of information technology. Blockchain technology happens to have irreplaceable advantages in building a food traceability system.
The use of blockchain technology to trace the source of food is also the traceability of the source of data. Use the characteristics of blockchain technology to build a safe and reliable system to make information and data transparent and checkable, and increase the cost of fraud, so as to ensure the accuracy and security of data; in addition, smart contract technology can also be used Streamline processes to improve efficiency.
*Distributed storage technology
Traditional food traceability is the centralized storage of information, which is stored in a server. The distributed storage of the blockchain breaks up data information into multiple small pieces of data, which are stored in different servers. This means that every computer is a node, and the more nodes are distributed, the more decentralized the blockchain network and the more secure network information. The food safety traceability platform uses blockchain technology to distribute information about food production, circulation, and consumption on each node. Even if one node is not working, it will not hinder the flow of information from other nodes, ensuring the safety and integrity of information.
*Hash algorithm and asymmetric encryption algorithm
Hash algorithm is also called hash algorithm. A fixed-length hash value is calculated from the digest or string of the information through an algorithm, which is equivalent to an ID card. The hash value is unique and one-way. The established information corresponds to a unique hash value. After the information is modified, the hash value will change accordingly. In addition, the hash value cannot be reversed out of the stored information, ensuring that the information is difficult to tamper with. After the hash value is stored on the chain and stored in the block, the block and the block are connected to form a block chain. The current block includes the hash value of the previous block, and the latter block includes the hash value of the previous block. Ensure the traceability of food circulation information.
Asymmetric encryption uses two keys: public key and private key. The public key is used to encrypt or verify the signature, and the private key is used to decrypt or sign. The two correspond to each other. The data encrypted with the public key can only be decrypted with the corresponding private key, and the data signed with the private key can only be verified with the public key. The use of these two types of technologies can not only trace the origin of food, but also monitor the entire process of food circulation and transaction to ensure food safety.
*Encryption anchoring technology
Encryption anchoring technology is a tamper-proof digital fingerprint, these fingerprints have a variety of manifestations, such as optical codes. The encryption anchor can be embedded in the product and linked with the blockchain to ensure the authenticity of the product from the departure to the delivery to the consumer. The encrypted anchoring technology of the ultra-micro trusted chip forms an encrypted anchored smart label, which ensures that the label and traceability information cannot be copied, and realizes the temperature and humidity monitoring of the whole process of food circulation. In addition, this technology combines the difficult-to-tamper and traceability characteristics of the blockchain to realize all-round anti-counterfeiting traceability of food.
*Traceability of the advantages of food safety with blockchain technology
Traditional food safety traceability mainly uses centralized storage technology, and food information is stored in a server. In this environment, food upstream and downstream participants may tamper with food information in order to achieve personal benefits. With the blessing of blockchain technology, the production, circulation, and sales of food have been monitored throughout the entire process, and food information has been truly transparent, traceable, and difficult to tamper with. Therefore, the blockchain food traceability technology dispels users' worries about food safety and solves the problem of trust among participants in all aspects of food production and circulation.
Through the use of blockchain, the source of food problems can be traced more quickly, which not only helps reduce consumer risks and provides safety guarantees, but also reduces financial losses through targeted recalls, thereby achieving peace of mind and peace of mind. , Worry-free!
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