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All Journal Jurnal Simantec EMITTER International Journal of Engineering Technology Network Engineering Research Operation [NERO] Jurnal Nasional Komputasi dan Teknologi Informasi Jurnal Riset Informatika Jutisi: Jurnal Ilmiah Teknik Informatika dan Sistem Informasi Jurnal Informasi Sains dan Teknologi (ISAINTEK) Jurnal Ilmiah Multidisiplin (JUKIM) Jurnal Komputer Teknologi Informasi Sistem Komputer (JUKTISI) Digital Transformation Technology (Digitech) Jurnal Ilmiah Edutic : Pendidikan dan Informatika Jurnal Adijaya Multidisiplin Jurnal Komputer Antartika
Muhlis Tahir
Universitas Trunojoyo Madura
Religion Aerospace Engineering Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mathematics Neuroscience Social Sciences Transportation Other

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Implementasi Algoritma AES dan SHA-256 untuk Acces Control dalam Pengamanan Data Siswa Berbasis Web Zulfatul Mufida; Muhlis Tahir; Adinda Mulya Rahayu
Jurnal Komputer Antartika Vol. 4 No. 2 (2026): Juli
Publisher : Antartika Media Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70052/jka.v4i2.1354

Abstract

Pengembangan sistem berbasis web dalam dunia pendidikan meningkatkan efisiensi pengelolaan data siswa, namun juga memperbesar risiko kebocoran data dan akses tidak sah. Penelitian ini bertujuan untuk mengimplementasikan sistem keamanan data siswa melalui integrasi algoritma kriptografi dan pembatasan hak akses. Metode yang digunakan adalah experimental research yang mencakup tahap perancangan, implementasi, dan pengujian sistem. Sistem keamanan ini dibangun dengan menerapkan fungsi hashing Secure Hash Algorithm 256 (SHA-256) untuk mengamankan proses autentikasi login pengguna. Sementara itu, kerahasiaan data siswa dijaga menggunakan enkripsi Advanced Encryption Standard (AES-GCM) sebelum disimpan ke database, serta didukung oleh mekanisme access control untuk membatasi hak pengaksesan data. Hasil pengujian menunjukkan bahwa sistem berhasil meningkatkan proteksi data siswa melalui pendekatan multi-layer security. Integrasi ketiga metode ini terbukti efektif dalam menjaga aspek kerahasiaan, integritas data, serta mencegah akses dari pihak yang tidak berwenang.   The development of web-based systems in education enhances the efficiency of student data management, yet it increases the risks of data breaches and unauthorized access. This study aims to implement a secure student data management system by integrating cryptographic algorithms and access restrictions. The method employed is experimental research, spanning system design, implementation, and testing phases. The security system is built by applying the Secure Hash Algorithm 256 (SHA-256) hashing function to secure the user authentication login process. Meanwhile, the confidentiality of student data is maintained using Advanced Encryption Standard (AES-GCM) encryption prior to database storage, supported by an access control mechanism to restrict data exposure. The testing results demonstrate that the system successfully enhances student data protection through a multi-layer security approach. The integration of these three methods proves effective in ensuring confidentiality, data integrity, and preventing unauthorized access.  
Pengembangan Digital Vault Multi-Format dan Pengujian Kerentanan Terhadap Unauthorized Access Ahmad Suhaimi; Muhlis Tahir; Anisatur Rohmah
Jurnal Komputer Antartika Vol. 4 No. 2 (2026): Juli
Publisher : Antartika Media Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70052/jka.v4i2.1376

Abstract

Perkembangan teknologi pengelolaan dokumen digital menuntut mekanisme keamanan tingkat file yang andal untuk mencegah risiko kebocoran data akibat unauthorized access. Banyak perangkat lunak pengamanan saat ini hanya optimal dalam menangani dokumen teks statis, namun mengalami kegagalan berupa kerusakan struktur file (file corruption) saat memproses berkas multimedia berukuran besar. Penelitian ini merancang dan mengimplementasikan sistem Digital Vault universal multi-format berbasis Python dan Streamlit dengan mengintegrasikan algoritma Advanced Encryption Standard (AES-128) untuk enkripsi konten berkas dan Secure Hash Algorithm (SHA-256) untuk pengamanan kredensial serta pembentukan kunci kunci kriptografi yang presisi. Sistem ini dirancang untuk mendukung fungsionalitas multi-format, mencakup dokumen administratif (.pdf, .xls) hingga berkas multimedia (.jpg, .mp4) secara utuh (lossless). Pengujian keamanan dilakukan secara agresif melalui tiga parameter serangan nyata: pembukaan paksa (Bypass Test), kunci salah (Invalid Key Test), dan simulasi pencurian berkas keluar dari platform server (Data Exfiltration Test). Hasil pengujian membuktikan bahwa Digital Vault berhasil mempertahankan integritas data tepat 100%, kebal terhadap bypass aplikasi standar, secara akurat menolak kunci tidak sah, dan file cipherteks yang dicuri tetap mempertahankan enkapsulasi keamanannya sehingga tidak dapat dieksploitasi oleh peretas.   The advancement of digital document management technology demands reliable file-level security mechanisms to prevent data leakage risks due to unauthorized access. Many current security software applications are only optimized for static text documents, yet they suffer from file corruption when processing large multimedia files. This study designs and implements a universal multi-format Digital Vault system based on Python and Streamlit, integrating the Advanced Encryption Standard (AES-128) for file content encryption and the Secure Hash Algorithm (SHA-256) for credential securing and precise cryptographic key derivation. The system is engineered to support multi-format functionalities, ranging from administrative documents (.pdf, .xls) to multimedia assets (.jpg, .mp4) with lossless integrity. Security testing was aggressively conducted through three real-world attack parameters: forced opening (Bypass Test), wrong cryptographic key submission (Invalid Key Test), and data theft simulation outside the host server platform (Data Exfiltration Test). The empirical results prove that the Digital Vault successfully maintains 100% data integrity, is fully resilient against standard application bypasses, accurately rejects unauthorized keys, and the exfiltrated ciphertext completely retains its security envelope, rendering it unexploitable to intruders.
Double Layer Encryption Caesar Cipher dan AES-128 untuk Pengamanan Data Teks Web Siboy Arisona; Nanda Aulia Ramadlani; Muhlis Tahir
Jurnal Komputer Antartika Vol. 4 No. 2 (2026): Juli
Publisher : Antartika Media Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70052/jka.v4i2.1377

Abstract

Keamanan data teks pada aplikasi web menjadi perhatian penting karena tingginya risiko penyadapan dan pencurian informasi digital. Penggunaan algoritma enkripsi tunggal masih memiliki kelemahan terhadap teknik kriptanalisis modern sehingga diperlukan metode pengamanan yang lebih kuat. Penelitian ini bertujuan membangun sistem pengamanan data teks berbasis web menggunakan metode double layer encryption dengan menggabungkan algoritma Caesar Cipher dan AES-128. Proses enkripsi dilakukan dalam dua tahap, yaitu plaintext dienkripsi menggunakan Caesar Cipher kemudian dilanjutkan dengan AES-128 untuk menghasilkan ciphertext yang lebih kompleks. Hasil penelitian menunjukkan bahwa kombinasi kedua algoritma mampu meningkatkan keamanan data karena ciphertext lebih sulit dianalisis dibandingkan penggunaan algoritma tunggal. Sistem yang dibangun juga mampu menjalankan proses enkripsi dan dekripsi dengan baik serta memberikan perlindungan data yang lebih baik.   Text data security in web-based applications has become important due to the increasing risk of interception and digital information theft. The use of a single encryption algorithm still has weaknesses against modern cryptanalysis techniques to modern cryptanalysis techniques; therefore, stronger security methods are required. This study aims to develop a web-based text security system using a double layer encryption method by combining Caesar Cipher and AES-128. The encryption process is carried out in two stages, where plaintext is encrypted using Caesar Cipher and then re-encrypted using AES-128 to produce more complex ciphertext. The results show that the combination of both algorithms improves data security because the ciphertext becomes more difficult to analyze compared to a single algorithm approach. The developed system is also capable of performing encryption and decryption processes properly while providing better protection for digital data.
Co-Authors Ach Almas Alvaradis Achmad Sukriyadi Adinda Dwi Putri Andreani Adinda Mulya Rahayu Agustina, Ais Zulaikha Ahmad Batsul Mushofi Septian Wachid Ahmad Faizal Prianggara Ahmad Suhaimi Ahmad yusril ihsan sya'bana Ihsan Alfian Firdausi Alfian Syah Putra Alfinatul Hasanah Ali Mubarok Arromadhoni Aliffia Nurrohmah Zulkarnain Alvi Sakia Mardiana Amir Sulton Andi Akram Nur Risal Andi Setiawan Anggi Indri Wijayaningrum Anggun Dwi Lestari Ani Sofiyah Anisatur Rohmah Aqiqul Putra Zaibintoro Auliya Turrofifah Ayu Agustyas Ningrum Ayu Pratiwi Basri, Hasan Brikitha Olivia Putri Irine Irawan Cindi Ajeng S. A Delsa Yurina Cholili Desi Fitriani Ningrum Desta Chilyani Diana Iis Maulidia Dimas Mayoni Aji Sasono Dina Mulaikah Dwi Fatkhul Mu’in Edi Purwanto Eliza Permatasari Eva Nabila Aprilia Faisal Erfani Farah Nisa’ Salsabila Fathricia Angel M. V. Fatimatus Sahroh Fatimatus zahroh Fauziah Nur Faqih Fhatiah Adiba Fifi Rinazah Rofiq Husnul Amalia iwan Syarif Jannatul Firdausiyah Khairunnisa Nur Susanti Khoirul Amin Abidin Kinanti, Setyaning Puji Luluk Fariska Utami Lumatus Sa'adah M Aditya Firmansyah M. Wildan Alvian Prastya Mar’atul Azizah Maulid Hidayat Miftakhul Hidayati Moch Shobibur Rohman Moch. Nasihuddin Moh Khoiruddin Moh Yasin Moh. Shaleh Helmi Muhammad Afi Maulana Mukhlis Ainur Rahman Nanda Afdlolul Basyar Nanda Aulia Ramadlani Nawafilillah Nimas Ayu Windrastuti Noferianto Sitompul Nofiyanti, Nofiyanti Nova Estu Harsiwi Nur Wachid Hidayatulloh Nurul Septiana Putra, Aditya Eka Putri Qomariyah Putri Septiyawati Qarinah Rikanawati Risma Dian Safira Rizkiyatul Zakiyah Robby Irsyad Faa'izzani Sabella Kalimatus Sa'diah Salman Alfarisi Salsabila Azura Septyan Hendra Sugara Siboy Arisona Sofyan Abduh F Sri Yuliani Susanti Susi Muslimah Terisha Sheline Shazhaq Tessy Badriyah, Tessy Tsasya Salsabila Umami Wahyuningsih Ummi Mutmainnah Vivia Auria Wahyu Dwi Angelina Puspitasari Zarwanda Ashfarina Zulfatul Mufida