Blockchain based Online Examination Assessment models for Educational Institutes: A Systematic Literature Review

Abstract

Educational institutes use different evaluation techniques to assess the learning process of students. This process of assessment in educational institutes is a sensitive issue and traditional evaluation methods often face certain difficulties like cheating, favoritism, political influence etc. Blockchain provides a very important feature of immutability and traceability and helps to manage various issue of online assessments. Once scores have been finalized, they cannot be changed. Every authorized node in the network will have knowledge of evaluation, hence any discrimination would become public. Different researchers have presented assessment models that use blockchain as core technology. To the best of our knowledge, no SLR has been presented till date to discuss educational assessment models using blockchain. This article briefly investigates those models, their working, limitations and performs quality assessment using a scoring criteria. This paper also highlights the research gaps that exist in this domain. Finally, an assessment model has been proposed in this article, to contribute in the domain of online examinational evaluation using blockchain that would help overcoming the limitations that arise in currently existing models.