Model For Improving The Reliability Of Online Exam Enhancement

Abstract

In recent times, Learning Management Systems (LMS) have gained significant popularity, particularly due to the
COVID-19 pandemic, offering improved effectiveness and efficiency. Within LMS, online exams have emerged as a
critical tool for assessing students’ performance and understanding of course material, playing a vital role in
determining their progression. Ensuring the reliability and transparency of online exam results is imperative. Any
vulnerability, such as hacking, can adversely impact students’ grades. Conventional online exam systems often store
data centrally in databases like MySQL, making them susceptible to unauthorized access and manipulation. This
paper presents a blockchain-based framework to enable secure and peer-to-peer conduction and evaluation of
academic exams. The framework uses hashing techniques to ensure data integrity and employs proof of stake
mechanisms for enhanced security. Blockchain’s decentralized data storage and cryptographic hashing for each
block make it effective in safeguarding data integrity. The paper demonstrates the use of blockchain for developing
online exams, storing each question and answer directly on the blockchain. To achieve this, we have created a
module that integrates with the Moodle learning management system. Through a comparative analysis with
Moodle’s default centralized storage, our module modifies the exam result storage, ensuring secure and tamperproof
data storage on the blockchain. By leveraging the blockchain, exam data is reliably secured, maintaining
integrity, and resisting manipulation.
Our results show that data stored on the blockchain is entirely accurate, with no discrepancies compared to
Moodle’s standard approach. The blockchain network provides a reliable and immutable platform, preventing
unauthorized changes to student data. In conclusion, our blockchain-based framework offers a robust solution for
enhancing the security and reliability of online exam results. By harnessing blockchain’s decentralized and tamperproof
nature, we ensure data integrity and transparency, providing a more trustworthy assessment of academic
performance