Evaluation of answer scripts is an essential component of any test or
educational institution to measure learner outcomes. In a digital script evaluation
system, write-up scripts are scanned and uploaded to the central server and assigned to
the evaluator for grading. A fair, consistent, unbiased, and error-free evaluation
protects an examination system's integrity and is essential for all educational
institutions. Most of the applications available in the market were concerned with
certificate administration. For an examination system, security, transparency,
accessibility, and trust are the major factors that can easily be audited when a
blockchain infrastructure is followed. There are a few challenges found in adopting
blockchain technology in this field, like scalability, cost of adaption, trust in
technology, etc. It is intended to create a totally transparent and effective examination
and reward system that may be utilized to replace the traditional system. This chapter
presents a self-sustaining educational environment on top of a blockchain for fair
assessment. The proposed method proved to be quite beneficial due to its decentralized
nature. In our framework, all the steps of evaluation processes are traced and recorded
through blockchain to improve the security, transparency, and trustfulness of the
system. This makes it simpler to figure out how a candidate obtained the score that he
or she did, providing credibility to the gained certificate.
Keywords: Blockchain, Decentralized, Digital evaluation, E-gradation, Online examination, Smart contract, Trustfulness, Transparency.
