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We propose a sustainable exam administration model, named DeExam, with enhanced reliability and transparency, utilizing a public blockchain with no centralized authority. In exams, which are intended to evaluate capability, it is practically difficult to detect errors or mistakes made by test providers and scorers, as the correct/incorrect decision logic is often not disclosed. The blockchain records the hash values of the correct answers, decision conditions, and decision results, which cannot be tampered with afterward. We implemented our proposed method using Bitcoin Core and used it to conduct a CTF (Capture The Flag) competition with over 100 participants. No fatal flaws were observed, thereby confirming the viability of the method.

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This page is a summary of: DeExam: A Decentralized Exam Administration Model using Public Blockchain, July 2021, ACM (Association for Computing Machinery),
DOI: 10.1145/3475992.3475993.
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