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All Journal SMARTICS Journal Edukasi Islami: Jurnal Pendidikan Islam El-Wasathiya: Jurnal Studi Agama Cendekia: Media komunikasi penelitian dan pengembangan pendidikan islam Journal of System and Computer Engineering Indo-MathEdu Intellectuals Journal SINDA: Comprehensive Journal of Islamic Social Studies Journal of Communication Studies Jurnal Pengabdian kepada Masyarakat Desa (JPMD) Jurnal Studi Pesantren Edudeena : Journal of Islamic Religious Education Al-Aqwal : Jurnal Kajian Hukum Islam Jurnal Cendekia : Media Komunikasi Penelitian dan Pengembangan Pendidikan Islam Al Mu'azarah: Jurnal Pengadian kepada Masyarakat MEKOMDA Cendekia: Media Komunikasi Penelitian dan Pengembangan Pendidikan Islam ATTANWIR: Jurnal Keislaman dan Pendidikan
Miftakhul Rohman, Muhammad Yasin, Iwan Marwan, Miftakhul Rohman,
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Religion Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Nursing Public Health Social Sciences Other

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Performance Optimization of Image Cryptography for Copyright Protection on High-Resolution Images Using the Hill Cipher with Flexible Matrix Keys Miftakhul Rohman; Abd. Charis Fauzan; Veradella Yuelisa Mafula
Journal of System and Computer Engineering Vol 7 No 1 (2026): JSCE: January 2026
Publisher : Universitas Pancasakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61628/jsce.v7i1.2471

Abstract

The increasing use of high-resolution digital images has raised serious concerns regarding copyright protection and unauthorized distribution. Image cryptography is one of the effective approaches to safeguard visual data by transforming images into unintelligible forms. The Hill Cipher algorithm, which is based on matrix operations, has potential for image encryption; however, its application to high-resolution images often suffers from high computational cost. This study proposes a performance optimization of image cryptography for copyright protection by exploiting the flexibility of matrix key sizes in the Hill Cipher algorithm. The optimization focuses on improving computational efficiency without modifying the fundamental cryptographic mechanism. Experiments were conducted on high-resolution images using different matrix key sizes (2×2, 3×3, and 4×4). Performance was evaluated in terms of encryption and decryption time, while security robustness was assessed using Entropy, Number of Pixel Change Rate (NPCR), and Unified Average Changing Intensity (UACI). The experimental results demonstrate that increasing the matrix key size significantly reduces the total computation time, achieving up to nearly 50% performance improvement, while maintaining high security levels. The encrypted images exhibit entropy values close to the ideal level, NPCR values above 99%, and stable UACI values, indicating strong randomness and diffusion properties. These findings confirm that the proposed optimization improves computational performance without compromising cryptographic security. Therefore, the optimized Hill Cipher remains effective and suitable for copyright protection of high-resolution images.
Co-Authors Afif Muhtar, Alvin Al Haris, Mohammad Basid Alaiya Choiril Mufidah Alaiya Choiril Mufidah, Alaiya Choiril ANANG DARUN NAJA Arif Muzayin Shofwan Arif Muzayin Shofwan Arif Muzayin Shofwan, Arif Muzayin Arifin, Achmad Midanul Aulia, Hanna Basid Al Haris, Mohammad Choirul Hidayah Darun Naja, Anang Doni Saputra Erly Ananta, Pinka Farah Nurul Nabila Feri Hardiansyah Fuad Ngainul yaqin Halimah, Atina Hanna Auliya Hanna Auliya Hidayah, Choirul Imam Subaweh Iwan Marwan, Iwan Karya Bakti, Imam Lailatul Fauzizah Marwan Hayeemaming Mirwan Hariri, Muh. Mochammad Arifin moh mirwan hariri muh mirwan hariri Muhammad Fikri ‘Ainun Najib, ainun Fikri Muhammad Yasin Muhtar, Alvin Afif Muttaqin, Asyharul Muzayin Shofwan, Arif Najib, Fikri Ainun nukman, moh Nur Khalifah Nur Sahid Nur Sahid Pamuji Muhamad Jakak Rusydi, Shania Sanra Setyoadi Pambudi Slamet . Veradella Yuelisa Mafula Wardianto Yaqin, Fuad Ngainul yusuf, saifudin ‘Ainun Najib, Muhammad Fikri