Kamble, S.Chandavarkar, B.R.2026-02-062023Lecture Notes in Electrical Engineering, 2023, Vol.1049 LNEE, , p. 119-13018761100https://doi.org/10.1007/978-981-99-3569-7_9https://idr.nitk.ac.in/handle/123456789/29461When employing authentication mechanisms to store user credentials, a subtle point to note is that they are easily vulnerable to cyber attacks like sharing of user data without their consent, password stealing on a large scale, etc. By decentralizing ownership of credentials and providing a framework for confirming one’s record in an unalterable chain of data, i.e., Distributed Ledger Technology (DLT) in general and blockchain can provide a solution. Blockchain technology can help reduce the risk of attacks and user data leaks through backdoors by establishing a secure platform for online service providers to authenticate users without a single point of failure. Blockchain is being utilized increasingly for trusted, decentralized, secure registration, authentication, and valuation of digital assets (assets, real estate, etc.) and transactions, governing interactions, recording data, and managing identity among numerous parties. Smart contracts are used to do transactions on the blockchain. This work aims to analyze the shortcomings of traditional authentication systems and hence provide a blockchain-based authentication solution to address them. In this paper, we suggest AuthBlock, a robust, lightweight, and secure blockchain-based authentication system. It can be used by multiple parties as an authentication framework in parallel without any interference. The proposed approach leverages the Ethereum blockchain along with its provision of smart contracts. The proposed method is tested on the Ethereum localnet created using Go Ethereum (Geth) and evaluated to analyze user authentication, verification, and cost. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.AuthenticationBlockchainGo EthereumSecuritySmart contracts