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All Journal Building of Informatics, Technology and Science sudo Jurnal Teknik Informatika
Rahmaddeni Rahmaddeni
Universitas Sains dan Teknologi Indonesia, Pekanbaru
Computer Science & IT Electrical & Electronics Engineering Engineering

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Optimasi Deteksi Intrusi Jaringan Menggunakan Hybrid Model Autoencoder dan Random Forest Afri Nanda; Torkis Nasution; Rahmaddeni Rahmaddeni; Herwin Herwin
Building of Informatics, Technology and Science (BITS) Vol 7 No 4 (2026): March 2026
Publisher : Forum Kerjasama Pendidikan Tinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/bits.v7i4.9309

Abstract

Conventional Intrusion Detection Systems often suffer from performance degradation due to their inability to handle the complexity of high-dimensional data and class imbalance in modern network traffic. This study aims to optimize the Network Intrusion Detection System (IDS) by addressing the limitations of the Random Forest algorithm in handling high-dimensional data and its lack of model transparency (black-box). The proposed method is a Hybrid model integrating an Autoencoder as a non-linear feature extractor and Random Forest as a classifier. The Autoencoder is trained using a semi-supervised strategy to generate latent features and Reconstruction Error (MSE), which serves as a robust anomaly indicator. Additionally, the Synthetic Minority Over-sampling Technique (SMOTE) is applied to address class imbalance in the NSL-KDD dataset. To address the challenge of interpretability, SHAP-based Explainable AI (XAI) is strategically implemented to elucidate the complex interactions between the Autoencoder-compressed latent features and the final classification decisions, thereby transforming this hybrid architecture into a transparent system. Evaluation results demonstrate that the Hybrid Autoencoder-Random Forest model outperforms the Random Forest Baseline, achieving an Accuracy increase of 2.54% (to 77.61%) and a Recall increase of 3.96% (to 62.31%). The significant improvement in the Recall metric empirically validates the effectiveness of hybrid features, specifically the Reconstruction Error, in detecting Zero-Day attacks characterized by unknown patterns. Furthermore, SHAP visualization successfully reveals the contribution of latent features, providing crucial transparency for network security forensic analysis.
Analisis Faktor Dominan Minat Beli Generasi Z di Shopee Menggunakan Algoritma Naïve Bayes Pingki Ans Saputra; Rahmaddeni Rahmaddeni; Sandra Septi Irawan; Robi Prianto; Delfi Delfi
sudo Jurnal Teknik Informatika Vol. 4 No. 3 (2025): Edisi September
Publisher : Ilmu Bersama Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56211/sudo.v4i3.1137

Abstract

Pertumbuhan pesat e-commerce di Indonesia telah mengubah perilaku konsumen, khususnya Generasi Z yang dikenal sebagai pengguna digital native. Penelitian ini bertujuan untuk menganalisis faktor-faktor dominan yang memengaruhi minat beli Generasi Z di platform Shopee dengan menggunakan algoritma Naïve Bayes. Data dikumpulkan melalui survei terhadap 100 responden Generasi Z aktif pengguna Shopee, dengan variabel yang meliputi harga, ulasan produk, kecepatan pengiriman, metode pembayaran, dan pengaruh sosial. Pengolahan data dilakukan menggunakan metode SEMMA (Sample, Explore, Modify, Model, Assess) dan diimplementasikan dalam perangkat lunak RapidMiner. Hasil penelitian menunjukkan bahwa faktor harga dan kecepatan pengiriman menjadi dua variabel paling dominan yang memengaruhi minat beli. Model klasifikasi terbaik diperoleh pada skenario split data 80:20 dengan akurasi sebesar 73,75%, recall kelas "YA" sebesar 88,89%, dan precision yang seimbang. Temuan ini memberikan kontribusi strategis bagi pelaku e-commerce, khususnya Shopee, untuk mengarahkan strategi pemasaran yang lebih sesuai dengan karakteristik dan preferensi Generasi Z.
Co-Authors Afri Nanda Delfi Delfi Herwin Herwin Pingki Ans Saputra Robi Prianto Sandra Septi Irawan Torkis Nasution