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All Journal JUTIK : Jurnal Teknologi Informasi dan Komputer JOURNAL OF APPLIED INFORMATICS AND COMPUTING MATRIK : Jurnal Manajemen, Teknik Informatika, dan Rekayasa Komputer Jurnal Manajemen Informatika dan Sistem Informasi Cyber Security dan Forensik Digital (CSFD) ICIT (Innovative Creative and Information Technology) Journal Jurnal Bumigora Information Technology (BITe) Jurnal: International Journal of Engineering and Computer Science Applications (IJECSA) Bakti Sekawan : Jurnal Pengabdian Masyarakat
Muhamad Azwar
Universitas Bumigora Mataram
Religion Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Social Sciences Other

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IMPELEMENTASI ALGORITMA AES DAN RSA UNTUK KEAMANAN PADA APLIKASI WEB CHAT TEAM SYNC Bagas Hadista Mulyadi; Muhammad innuddin; Ondi Asroni; Muhamad Azwar; kurniadin Abdul Latif
Jurnal Manajemen Informatika dan Sistem Informasi Vol. 9 No. 1 (2026): MISI Januari 2026
Publisher : LPPM STMIK Lombok

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36595/misi.v9i1.1807

Abstract

Perkembangan teknologi informasi meningkatkan kebutuhan akan keamanan data, khususnya pada aplikasi web chat yang digunakan untuk pertukaran informasi sensitif. Penelitian ini mengimplementasikan kriptosistem hybrid yang mengombinasikan AES-256 untuk enkripsi pesan dan RSA-2048 untuk distribusi kunci pada fitur pesan aplikasi web Team Sync. Mekanisme end-to-end encryption diterapkan di sisi klien menggunakan pustaka kriptografi berbasis JavaScript guna memastikan server tidak dapat mengakses isi pesan. Evaluasi meliputi pengujian enkripsi–dekripsi, analisis keamanan kunci, serta uji fidelity pesan. Hasil pengujian menunjukkan bahwa proses enkripsi dan dekripsi berjalan akurat tanpa kehilangan data serta mampu mendukung komunikasi real-time secara efisien. Dengan demikian, kombinasi RSA dan AES terbukti efektif dalam meningkatkan kerahasiaan, integritas, dan privasi pesan pada aplikasi Team Sync.
Performance and Security Analysis of MQTT over TLS on ESP32-Based IoT Systems M. Azhar Azhar; Muhamad Azwar; Ondi Asroni
Journal of Applied Informatics and Computing Vol. 10 No. 4 (2026): August 2026
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jaic.v10i4.13355

Abstract

The Message Queuing Telemetry Transport (MQTT) protocol is widely used in Internet of Things (IoT) systems due to its lightweight communication mechanism and low resource consumption. However, MQTT does not provide built-in security features, making data transmission vulnerable to packet sniffing and data manipulation attacks. This study aims to analyze the impact of Transport Layer Security (TLS) implementation on the security and performance of MQTT communication in an ESP32-C3 Super Mini-based IoT system. An experimental method was employed by comparing MQTT communication without TLS (port 1883) and with TLS (port 8883) using the HiveMQ Cloud broker. Performance evaluation was conducted by measuring latency and packet size, while security analysis was performed through packet sniffing using Wireshark. The results show that TLS successfully encrypts MQTT payloads, preventing unauthorized access to transmitted data. However, TLS introduces communication overhead, increasing the average latency from 45.25 ms to 51.76 ms (14.39%) and the average packet size from 79 bytes to 103.2 bytes (30.63%) due to the TLS handshake process and encryption mechanism. Despite these increases, the communication performance remained stable and consistent, indicating an acceptable trade-off between security and performance. These findings demonstrate that TLS is a feasible solution for securing MQTT communication in ESP32-based IoT systems while maintaining reliable communication performance.
Co-Authors Azhar, Raisul Bagas Hadista Mulyadi Eka Nurul Qomaliyah Fatimatuzzahra Fatimatuzzahra Fietyata Yudha Hairani Hairani Husain I Putu Hariyadi Juvinal Ximenes Guterres Juvinal Ximenes Guterres Kurniadin Abd Latif Lilik Widyawati M. Azhar Azhar Mikha Christian Satria Girsang Mudawil Qulub Muhammad Innuddin Muhammad Zulfikri Nurul Indriani Ondi Asroni Ondi Asroni Pahrul Irfan Purwoko, Agus Reza Bahtiar Saputra Riwayati Malika Sri Winarni Sofya Sukatin, Sukatin Syahrir, Moch.