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2021-09-30
Kinai, Andrew, Otieno, Fred, Bore, Nelson, Weldemariam, Komminist.  2020.  Multi-Factor Authentication for Users of Non-Internet Based Applications of Blockchain-Based Platforms. 2020 IEEE International Conference on Blockchain (Blockchain). :525–531.
Attacks targeting several millions of non-internet based application users are on the rise. These applications such as SMS and USSD typically do not benefit from existing multi-factor authentication methods due to the nature of their interaction interfaces and mode of operations. To address this problem, we propose an approach that augments blockchain with multi-factor authentication based on evidence from blockchain transactions combined with risk analysis. A profile of how a user performs transactions is built overtime and is used to analyse the risk level of each new transaction. If a transaction is flagged as high risk, we generate n-factor layers of authentication using past endorsed blockchain transactions. A demonstration of how we used the proposed approach to authenticate critical financial transactions in a blockchain-based asset financing platform is also discussed.