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Abstract: In today's digital era, data has become a paramount asset, surpassing traditional commodities in value. As users increasingly prioritize safeguarding their information from external threats, blockchain technology emerges as a premier solution, offering unparalleled security and data integrity. Initially associated with cryptocurrency, blockchain has evolved to serve diverse private and enterprise applications, ensuring robust data protection. The core of blockchain technology lies in its decentralized architecture, which enables secure and efficient data transmission within a network, keeping information shielded from unauthorized access while granting privileged users exclusive rights for data interaction. Major global corporations such as Walmart, IBM, and Google are actively integrating blockchain technology to develop Decentralized Applications (DApps). These smart systems, executed on distributed computer networks, facilitate the creation of Smart Contracts—automated, secure, distributed ledgers that enable tamper-proof and transparent transactions. Utilizing the robust cryptographic algorithm SHA256, Smart Contracts generate a 256-bit signature for input text, ensuring data security and integrity. The Ethereum Blockchain Platform, a widely adopted public network, plays a crucial role in enabling secure transaction exchanges through DApps. Blockchain technology's impact spans various sectors, including marketing, business, education, and supply chain management. This study explores the application of the Ethereum Blockchain Platform within the academic system, specifically focusing on the development of an Online Examination System. The proposed application leverages Smart Contracts, NodeJS for server runtime, and MongoDB as the database system, demonstrating enhanced security over traditional cloud-based solutions. The findings highlight the superior trustworthiness and reliability of blockchain-based online examination systems compared to conventional methods.
Bhaskar Narayan Vaidya (Thu,) studied this question.