Abstract

Abstract: Counterfeit products have become a major concern for businesses and consumers, leading to financial losses, brand damage, and public safety risks. In response, the integration of QR codes and blockchain technology offers a promising solution for enhanced product authentication and counterfeit prevention. This paper explores the combined use of QR codes and blockchain to create a secure, transparent, and tamper-proof system for tracking and verifying products across the supply chain. QR codes, serving as digital markers, enable easy scanning and retrieval of product information, while blockchain’s decentralized and immutable nature ensures an auditable and secure record of each transaction and movement of the product. Together, these technologies provide a reliable mechanism for consumers to verify product authenticity and for businesses to protect their brand integrity. The survey reviews current advancements in the field, evaluates key challenges such as scalability, privacy concerns, and the costs of implementation, and discusses opportunities for future innovation. A case study of a real-world implementation is also presented, demonstrating the practical benefits and limitations of the system. This research concludes that the integration of QR codes with blockchain has the potential to revolutionize product authentication, significantly enhancing trust in global supply chains. Keywords: QR codes, Blockchain technology, Product authentication, Counterfeit prevention, Supply chain security, Decentralized verification, Brand protection, Immutable ledger, Transparency in supply chain, Anti-counterfeiting technologies, Consumer trust, Blockchain in logistics, Digital product authentication.