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All Journal Sinkron : Jurnal dan Penelitian Teknik Informatika Journal of Computer Science, Information Technology and Telecommunication Engineering (JCoSITTE)
Ardi Birawinata
Universitas Bina Darma
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering

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Development of a Blockchain-Based Digital Data Identity Management System Ardi Birawinata; Muhammad Nasir
Journal of Computer Science, Information Technology and Telecommunication Engineering Vol 7, No 1 (2026)
Publisher : Universitas Muhammadiyah Sumatera Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/jcositte.v7i1.29044

Abstract

The management of student identity data requires a system that ensures data security, integrity, and transparency. Conventional data management methods are vulnerable to data redundancy and manipulation, particularly in educational institutions. This study aims to develop a blockchain-based digital identity data management system for SMK Bina Sriwijaya Palembang using the Prototyping development method. The Prototyping approach was selected to allow iterative system evaluation and validation, especially for complex Smart Contract logic. The system was implemented as a web-based application using React JS for the front-end and Node.js for the back-end, with Ethereum Smart Contracts developed in Solidity. Ganache was used as a local blockchain network for testing, while IPFS was integrated for decentralized storage of digital assets. The results show that the proposed system successfully secures student identity data, prevents unauthorized data manipulation, and improves the efficiency of data verification processes. This study demonstrates that blockchain technology combined with a prototyping approach can provide a reliable solution for digital identity management in educational environments.
Self-Sovereign Identity Using WalletConnect for Issuing, Verifying, and Revoking Academic Credentials Ardi Birawinata; Siti Sauda
Sinkron : jurnal dan penelitian teknik informatika Vol. 10 No. 4 (2026): Research Articles October 2026
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/sinkron.v10i4.16777

Abstract

Student data at vocational high schools is managed solely by the schools, so external parties must contact the school to confirm a record, while account access still relies on passwords vulnerable to credential theft. This study implements a Self-Sovereign Identity system for student academic data at SMK Bina Sriwijaya Indonesia Palembang that combines passwordless WalletConnect authentication with credential issuance, verification, and revocation anchored on a public blockchain. Following the Design Science Research Methodology, the artefact was built as a web prototype using React.js, Express.js, and PostgreSQL, connected to MetaMask and to a CredentialRegistry smart contract on Ethereum Sepolia. Users authenticate through an EIP-191 challenge-response signature, student identity is expressed as a did:ethr Decentralized Identifier, and academic data is issued as W3C Verifiable Credentials whose canonicalised Keccak-256 hash and status are recorded on chain, while the complete record remains off chain. Evaluation covered four levels: eighteen black-box functional cases, thirty smart contract unit tests, seventeen backend tests, and fourteen security cases at the authentication and verification boundary, plus gas measurement of every state-changing function on Sepolia. All seventy-nine cases produced the expected output, which demonstrates functional conformance and correct access control rather than a general guarantee of security, since independent penetration testing and a formal contract audit were not performed. Within these limits, a verifier can check authenticity, issuer, and validity independently, without confirmation from the school and without exposing personal data on a public blockchain.
Co-Authors Muhammad Nasir Siti Sauda