Blockchain-Based Certification for Online Quiz Competitions
Year: 2025
Type: article
Abstract: Online quiz competitions have grown rapidly as tools for education, recruitment, and outreach. However, the integrity and provenance of certificates issued to winners and participants remain a concern: centralized certificate systems are vulnerable to tampering, forgery, and single-point failures. This paper presents a blockchain-based certification framework for online quiz competitions that ensures tamper-evident, verifiable, and easily-shareable digital certificates. We describe the system architecture, smart contract design, certificate generation workflow, and an implementation prototype using Ethereum-compatible smart contracts and InterPlanetary File System (IPFS) for off-chain storage of certificate metadata. Evaluation includes security analysis, gas-cost benchmarking, and a user verification latency study. Results show that the proposed approach provides strong integrity guarantees, acceptable cost for small-to-medium events, and fast verification (sub-second for on-chain lookups when using light clients). We conclude with limitations, potential improvements, and directions for future work.
Authors: Ankush Kumar, Devansh Verma
Language: English
Subfield: Information Systems
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7106288345
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