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All Journal JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH) Journal of Computer System and Informatics (JoSYC)
Syamsul Bahri
Universitas Tanjungpura, Pontianak
Computer Science & IT Decision Sciences, Operations Research & Management Industrial & Manufacturing Engineering

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Sistem Pemilah Menggunakan Conveyor dan Pemantauan Ketinggian Sampah Logam, Anorganik, dan Organik Berbasis Internet of Things Youla Gessel; Syamsul Bahri; Irma Nirmala
Journal of Computer System and Informatics (JoSYC) Vol 4 No 4 (2023): August 2023
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/josyc.v4i4.3841

Abstract

Pemilahan jenis sampah logam, anorganik dan organik dilakukan agar sampah terkumpul sesuai jenisnya dan mempermudah pengolahan. Selain itu, pemantauan diperlukan untuk memberi informasi pada saat tempat sampah dalam keadaan penuh. Oleh sebab itu, diperlukan sistem yang dapat memilah dan memantau ketinggian sampah pada tempatnya. NodeMCU ESP32 sebagai pengendali keseluruhan sistem. Sensor proximity induktif, kapasitif, dan optik untuk deteksi jenis sampah, motor servo untuk pemilahan, dan sensor ultrasonik HC-SR04 untuk pemantauan ketinggian sampah. Antarmuka website digunakan untuk pemantauan tempat sampah dari jarak jauh. Pengujian keseluruhan oleh ketiga sensor pendeteksi jenis sampah mendapatkan akurasi keberhasilan yaitu 96,67%. Pengujian pembacaan sensor ultrasonik HC-SR04 mendapatkan nilai error sebesar 2,517% untuk ultrasonik HC-SR04 1, nilai error sebesar 1,9315% untuk ultrasonik HC-SR04 2, dan nilai error sebesar 2,176% untuk ultrasonik HC-SR04 3. Hasil pengujian sistem menunjukkan sampah yang terkumpul sudah sesuai dengan jenisnya dan mempermudah pengguna dalam memantau tempat sampah penuh atau tidak.
Implementasi Algoritma Kriptografi RSA untuk Keamanan Transmisi Data pada Sistem Monitoring Energi Listrik Berbasis IoT Rajawali Rajawali; Syamsul Bahri; Kasliono Kasliono
Journal of Information System Research (JOSH) Vol 7 No 3 (2026): April 2026
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/josh.v7i6.8232

Abstract

Data security is a crucial issue in Internet of Things (IoT) systems used to monitor electricity consumption. This study aims to enhance the security of data transmission in an IoT-based electricity monitoring system by implementing the Rivest–Shamir–Adleman (RSA) cryptographic algorithm. Data from the PZEM-004T sensor is encrypted using the RSA public key and verified with a digital signature before being transmitted to the server. The system was tested under two conditions: without encryption and with RSA encryption, including a simulated ARP spoofing attack using Ettercap. The results show that the system successfully rejected manipulated data, with a packet loss rate of 2.08%, which is categorized as “very good” based on the TIPHON standard, and achieved a throughput of approximately 9.88 bit/s. The implementation of RSA proved effective in maintaining data integrity and authenticity, thereby improving the reliability of the IoT-based electricity monitoring system.
Peningkatan Keamanan Kunci Vigenère Menggunakan Steganografi Least Significant Bit (LSB) pada Sistem IoT Smart Door QR Code Kasliono Kasliono; Syamsul Bahri; Dwi Marisa Midyanti; Muhammad Dito Asrofa; Riski Arasyid
Journal of Information System Research (JOSH) Vol 7 No 4 (2026): July 2026
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/josh.v7i4.9205

Abstract

In an increasingly connected digital era, the Internet of Things (IoT) enables seamless real-time data exchange across devices but also introduces critical challenges in data security. Although symmetric cryptography is widely adopted for its computational efficiency, key distribution and protection remain major vulnerabilities. This study aims to enhance IoT network security by integrating the Vigenère Cipher with Least Significant Bit (LSB) steganography. The LSB method is employed to conceal cryptographic keys within digital media, reducing the risk of unauthorized key interception. The proposed system is evaluated across three communication channels: the server, the user web interface, and ESP32/ESP32-CAM devices. Sniffing attack tests confirm that all transmitted data appears only as ciphertext, indicating successful protection of plaintext and secure key exchange. Performance measurements also demonstrate that the combined methods operate efficiently. On the server, encryption and encode require an average of 0.14 ms, while decode and decryption on the user web interface require 0.13 ms. On the ESP32-CAM, encryption and encode average 2.22 ms, with decode and decryption on the server requiring 0.10 ms. For the ESP32, server-side encryption and encode take 0.10 ms, while device-side decode and decryption take 1.46 ms. Overall, the integration of Vigenère Cipher and LSB steganography effectively improves data security in IoT communication without significantly impacting system performance.
Co-Authors Dwi Marisa Midyanti Irma Nirmala Kasliono Kasliono Muhammad Dito Asrofa Rajawali Rajawali Riski Arasyid Youla Gessel