Intelligent System for Checking the Authenticity of Goods Based on Blockchain Technology

The rapid spread of counterfeit in the market has become a significant issue in the 21st century. Counterfeit goods cause material damage to the producers of original goods and pose a substantial threat to buyers' health. As a result, many companies are already trying to combat this phenomenon in a variety of ways. There are two main ways to combat counterfeiting: the way to find and ban counterfeit manufacturers and the way to identify authentic goods by buyers. The subject of this bachelor's thesis research is the developed information system for the authenticity of goods based on blockchain technology. Here is how this system works. Each product manufacturer is a separate node of the P2P network. Manufacturers create units of goods as individual wallets and give them a certain balance. They then place the public and private keys of the goods in URL format and place the QR codes with this URL on the packaging of the goods, thus transferring ownership of the goods to the buyer. When the buyer scans the secret code, the balance of the interests is transferred back to the manufacturer. When scanning the public code, the system determines product status based on the balance of the product wallet: if the balance is zero, then the product is already consumed, and if not, then the product is not consumed. In this way, the buyer can determine whether this product has ever been used or unpacked before him. If the buyer receives the used product, he can return it to the store. Java programming language tools were used to implement the blockchain. RSA was chosen as the cryptographic algorithm, and the SHA256 algorithm was selected for hashing. The Spring Boot framework was used to optimize the software development process. This article consists of five sections: an analytical review of literature sources, system analysis, selection of tools and technologies for system implementation, description of the created software, and, finally, the economic part. Each section is accompanied by a detailed explanation and a summary of the work done. The developed program is provided as a set of executable JAR files. These files can be run either manually or using the included BAT scripts. The fourth section presents the results of a study of the program's behaviour depending on the variables. At the end of the work are applications that contain the most important blocks of code, a configuration file, and an example of serialization of the blockchain