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Iwan Fitrianto Rahmad
Universitas Potensi Utama
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Developing Digital Examination System Security through the Implementation of the RC4 Algorithm Lubis, Muhammad Luthfi Moratuah; Rahmad, Iwan Fitrianto
Jurnal ICT : Information and Communication Technologies Vol. 16 No. 2 (2025): October, Jurnal ICT : Information and Communication Technologies
Publisher : Marqcha Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/jict.v16i2.274

Abstract

The increasing shift toward digital-based academic administration presents significant challenges for educational institutions, particularly regarding the security of examination data, which remains vulnerable when managed through manual processes. To address this issue, this study aims to develop and implement a secure web-based digital examination system using the RC4 cryptographic algorithm to ensure the confidentiality, integrity, and availability of assessment records at Harapan Mekar 1 Vocational School. Employing the CRISP-DM methodology, the research includes business understanding, data preparation, system development, encryption–decryption integration, and system validation. The RC4 algorithm, known for its lightweight structure and fast computational performance, was applied to encrypt student, teacher, and examination data across all operational modules. The results show that the system successfully encrypts and decrypts data through stable implementation of the Key Scheduling Algorithm (KSA) and Pseudo Random Generation Algorithm (PRGA), thereby strengthening protection against unauthorized access and eliminating risks associated with traditional manual data handling. The system effectively enhances operational efficiency and data security, demonstrating that RC4 remains a viable encryption option for educational environments with limited computational resources. This study offers practical implications for schools seeking accessible security solutions and serves as a reference for further system enhancements using more advanced cryptographic algorithms or extended digital examination features.
Co-Authors Aditya, Elsa Akbar, M. Ridho Alfa Saleh Alfa Soleh Alfa Soleh Amri, Aulia Ardani, Tira Azhar, Wahyu Bob Subahan Riza Budi Triandi Budi Triandi Budi Triandi, Budi Doni, Rahmad Edy Victor Haryanto, Edy Victor Erdiana Gultom Evri Ekadiansyah Evri Ekadiansyah Fragastia, Vidi Agung Ginting, Ria Ukur Harahap, Nur Anzelina Hardianto Hardianto Harold Situmorang, Harold Helmi Kurniawan Helmi Syaiful Rahman Hestina Irfannur Diah Juanda Hakim Lubis Juanda Hakim Lubis Juanda Hakim Lubis Khairul Ummi, Khairul Lili Tanti Lili Tanti, Lili Lubis, Muhammad Luthfi Moratuah M Rizky M. Alif Firdiansyah Maulana Fajar Sidik Mesran Mesran, M.Kom Muhammad Arif Prayudi, Muhammad Arif Muhammad Yusra Rustam Nur Fadillah Pairin, Yusfrizal Bin Pasaribu, Jamil Puji Widodo Purba, Adelina Rahmad Aditya Rahmad Aditya Rahmad Doni Rahmad Doni Rahmad Doni Rahmad, Sofyan Ratih Puspasari Reza Hermawan Riah Ukur Ginting, Riah Ukur Robby Ardyanto Marsudi Samsir Samsir Samsir Samsir, Samsir Setiawan, Adil Siregar, Rahmadani Sri Mulia Mz Tanjung, Dahriyani Hakim Tumbur Munthe Wahyu Azhar Wiwi Verina Yudhi Andrian