A colourful NFT-based distributed digital passport for secure web 3.0 authentication
Amir Mohammad Nateghi, Maedeh Mosharraf · Cyber-Physical Systems · 2025
Advances in Web 3.0 technologies, such as blockchain and AI, are increasing demand for stronger authentication solutions. This study introduces a decentralized digital passport system based on blockchain and Non-Fungible Tokens (NFTs). The method converts user identity data into hashed images, combines them, and stores them in distributed storage. A smart contract then registers the image address and user details as an NFT on the blockchain, forming a secure digital passport. This method enhances security, transparency, and decentralized data management. NFT-based digital passports can significantly improve authentication efficiency and security, even with repeated verification, while simplifying access to systems requiring authentication.