BC-PASys: A Blockchain-Based Secure and Reliable Peer Assessment System for Online Course

Online learning has become popular due to its flexibility and convenience. However, the huge number of e-works will increase the pressure on teachers. Peer assessment can effectively solve the problem by utilizing the scores of learners. However, there are two main problems (low security of data and low credibility of results) in traditional assessment systems. Blockchain is essentially a distributed database system with the characteristics of decentralization, traceability, difficulty in being tampered with, and high security. Therefore, integrating blockchain technology into peer assessment can solve the problems mentioned above. This paper applies blockchain technology to peer assessment to design and implement a secure and reliable peer assessment system (BC-PASys). The system proposed in this study can ensure the security of origin assessment data and the reliability of peer assessment results, which can finally promote the large-scale application of peer assessment and enrich the application scenarios of blockchain technology.