Ulumuddin, Zaid Ahlun, and Halim Maulana. 2026. “Design and Development of a Web3-Based Student Graduation Badge System for FIKTI UMSU Using Non-Transferable NFTs and Smart Contracts on the Ethereum Testnet”. Jurnal Sains, Teknologi &Amp; Komputer 3 (1):48-54. https://doi.org/10.56495/saintek.v3i1.1309.