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Network Intrusion Detection Using Ensemble Learning Techniques on the CIC-IDS2017 Public Dataset Sugeng Hendra Wijaya; Andhika Adnan
Technema: Journal of Intelligent Engineering and Computing Vol. 1 No. 1 (2026): March: Technema: Journal of Intelligent Engineering and Computing
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

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Abstract

Network intrusion detection remains a critical challenge in cybersecurity due to evolving attack patterns, class imbalance, and high-dimensional network traffic data. This study investigates the effectiveness of ensemble learning techniques on the CIC-IDS2017 public dataset, integrating decision trees, random forests, and gradient boosting models through stacking, voting, and hybrid Boost-Bag strategies. Data preprocessing involved normalization, handling missing values, and feature selection based on correlation and mutual information to reduce dimensionality while preserving predictive relevance. Empirical evaluation employed stratified 10-fold cross-validation and performance metrics including accuracy, recall, F1-score, and AUC-ROC, with additional analyses of confusion matrices and temporal stability to assess operational reliability. Results indicate that hybrid ensembles achieve superior detection performance, particularly for low-frequency attacks, while maintaining moderate computational overhead compared to individual classifiers. Comparative insights reveal trade-offs between accuracy, minority-class sensitivity, and inference latency, guiding practical deployment considerations. The findings substantiate the theoretical benefits of ensemble diversity and optimized feature selection, offering a robust framework for scalable, interpretable, and resilient network intrusion detection systems.
Teori Graf Diskrit untuk Deteksi Intrusi dan Optimasi Firewall: Systematic Literature Review Andhika Adnan; Fransiskus Mario Hartono Tjiptabudi; Ricky Imanuel Ndaumanu; Yohanis Malelak
JITU Vol 10 No 1 (2026)
Publisher : Universitas Boyolali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36596/jitu.v10i1.2306

Abstract

The escalating complexity of computer networks and cybersecurity threats demand analytical approaches capable of systematically and measurably representing network structure. Discrete mathematical graph theory offers a formal framework for modeling network topology as nodes and edges, thus potentially supporting more effective intrusion detection and firewall placement optimization. This research aims to conduct a Systematic Literature Review of publications from 2022–2026 to identify graph theory applications in intrusion detection, evaluate the most effective graph-based firewall optimization methods, and map research gaps and future development trends. The methodology employed follows the SLR protocol with stages of systematic search across reputable databases, selection based on inclusion-exclusion criteria, and analysis through descriptive-comparative meta-analysis, thematic meta-synthesis, and content analysis. Results show the dominance of weighted graphs and structure-based learning approaches for network anomaly detection, as well as firewall optimization modeling through integer linear programming and graph heuristics. This research contributes to presenting an integrated synthesis between intrusion detection and firewall optimization within discrete graph framework, and provides conceptual foundation for developing adaptive network security models based on mathematical structure.
PENILAIAN RISIKO KEAMANAN SIBER YANG DITINGKATKAN DENGAN GENERATIVE AI (STUDI KASUS WEBSITE PERGURUAN TINGGI DI KALIMANTAN): GENERATIVE AI-ENHANCED CYBERSECURITY RISK ASSESSMENT: A CASE STUDY OF HIGHER EDUCATION INSTITUTION WEBSITES IN KALIMANTAN Manorang Gultom; Andhika Adnan
HOAQ (High Education of Organization Archive Quality) : Jurnal Teknologi Informasi Vol. 17 No. 2 (2026): Jurnal HOAQ - Teknologi Informasi
Publisher : Universitas Uyelindo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52972/hoaq.vol17no2.p306-317

Abstract

Penelitian ini mengembangkan kerangka GenAI-Enhanced Cyber Risk Assessment untuk website perguruan tinggi dengan mengintegrasikan pembangkitan skenario serangan sintetis, validasi berbasis bukti, pemodelan attack graph, serta kuantifikasi risiko menggunakan CVSS, EPSS, dan centrality. Penelitian menggunakan Design Science Research dengan pendekatan mixed methods. Pipeline yang dikembangkan terdiri atas Generator Agent, Evaluator Agent, dan Reasoning Agent. Pada dataset penelitian, sebanyak 1.284 skenario unik dihasilkan setelah penyaringan format, pemeriksaan bukti, dan deduplikasi. Sebanyak 146 skenario dipilih untuk limited security validation; jumlah skenario yang memenuhi seluruh kriteria validasi empiris dilaporkan secara terpisah. Perhitungan skor risiko dilakukan secara deterministik menggunakan kombinasi CVSS normalized, EPSS, dan centrality dengan bobot 0,50, 0,30, dan 0,20. Analisis ekonomi berbasis skenario menunjukkan estimasi incremental ROI sebesar 117,5% dan benefit–cost ratio sebesar 2,18:1 pada asumsi baseline ALE Rp700.000.000, reduksi ALE 18%, dan biaya tambahan GenAI Rp57.920.000 per tahun. Nilai ekonomi tersebut merupakan estimasi sensitivitas, bukan return aktual, karena belum didasarkan pada data insiden dan biaya operasional longitudinal. Hasil penelitian menunjukkan potensi penggunaan GenAI untuk mempercepat penyusunan dan prioritisasi skenario risiko, tetapi generalisasi masih dibatasi oleh jumlah website, ketergantungan pada data sintetis, dan cakupan validasi keamanan yang terbatas.   This study develops a GenAI-Enhanced Cyber Risk Assessment framework for university websites by integrating the generation of synthetic attack scenarios, evidence-based validation, attack graph modeling, and risk quantification using CVSS, EPSS, and centrality. The study employs Design Science Research with a mixed-methods approach. The developed pipeline consists of a Generator Agent, an Evaluator Agent, and a Reasoning Agent. In the research dataset, a total of 1,284 unique scenarios were generated after format filtering, evidence checking, and deduplication. A total of 146 scenarios were selected for limited security validation; the number of scenarios meeting all empirical validation criteria is reported separately. Risk scores were calculated deterministically using a combination of normalized CVSS, EPSS, and centrality, weighted at 0.50, 0.30, and 0.20, respectively. Scenario-based economic analysis shows an estimated incremental ROI of 117.5% and a benefit–cost ratio of 2.18:1, assuming a baseline ALE of Rp700,000,000, an ALE reduction of 18%, and additional GenAI costs of Rp57,920,000 per year. These economic values are sensitivity estimates, not actual returns, as they are not yet based on longitudinal incident data and operational costs. The study results indicate the potential for using GenAI to accelerate the development and prioritization of risk scenarios; however, generalizability remains limited by the number of websites, reliance on synthetic data, and limited security validation coverage.