NextGen Security: A Secure and Decentralized Authentication Protocol using Non-Transferable Blockchain-Based Tokens

Abstract

In today's hyperconnected digital environment, authentication and security are paramount. As technology evolves, traditional methods of authentication such as usernames and passwords have proven increasingly vulnerable to cyberattacks, phishing scams, and identity theft. This has led to a growing need for a more secure, decentralized, and tamper-proof system to safeguard digital identities. This paper titled “NextGen Security: A secure and Decentralized authentication protocol using Non- transferable Blockchain-based Tokens” addresses this concern by proposing an innovative framework that leverages blockchain technology to implement a robust, distributed authentication mechanism. This paper envisions a future where authentication is not controlled by a centralized authority, but is instead managed through a distributed ledger. Blockchain, with its decentralized and immutable nature, ensures that user credentials and identity records are stored securely across multiple nodes, eliminating the single point of failure problem that plagues traditional systems. The proposed framework integrates Ethereum-based smart contracts, Keccak-256 (SHA- 3) hashing, and non-transferable Soulbound Tokens (SBTs) to ensure secure and decentralized identity verification. The system leverages wallet-based authentication through MetaMask and Web3.py, enabling cryptographically verifiable and tamper- proof login events on the blockchain.