Blockchain-based Self-scoring Method

Abstract

Quiz sites are typically made up of a front end, a back end, and a database of questions. Our objective is to further commonize this structure. Problem verification and solution keeping are aspects that have already been thoroughly studied and modified. However, the fairness of answer validation is often unclear to the end user. We propose a system that reduces the cost of creating a quiz site and a quiz scoring system for e-learning by putting part of the structure on a blockchain. Our system verifies answers using zero-knowledge proofs, stores the answers with Ethereum, an open-source platform for decentralized applications, and tracks them. Blockchain can be used to prevent the falsification of answer records. Ethereum is a new technique that has attracted considerable attention in recent years, and we use its program executions, i.e., smart contracts, to validate answers. After receiving an answer, the system stores it as an Ethereum transaction event.