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All Journal Scientific Journal of Informatics Adopsi Teknologi dan Sistem Informasi
Muhammad Rafif Hanif
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Computer Science & IT

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Penerapan K-Means Clustering dalam Analisis URL Phishing untuk Identifikasi Risiko Keamanan Menggunakan Model PCA Sitompul, Tua Delima; Davina Putri Ananta; Muhammad Rafif Hanif; Wati, Masna; Haviluddin
Adopsi Teknologi dan Sistem Informasi (ATASI) Vol. 4 No. 2 (2025): Adopsi Teknologi dan Sistem Informasi (ATASI)
Publisher : Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/atasi.v4i2.2887

Abstract

Phishing merupakan ancaman siber yang terus berkembang, dan metode deteksi berbasis daftar hitam memiliki keterbatasan signifikan dalam mengidentifikasi situs phishing baru. Penelitian ini menerapkan K-Means Clustering untuk mengelompokkan URL phishing berdasarkan karakteristiknya, menggunakan dataset PhiUSIIL Phishing URL dengan 235.795 sampel. Melalui preprocessing data yang komprehensif, analisis jumlah klaster optimal menggunakan Silhouette Score menghasilkan k = 2 dengan skor 0,972 pada pendekatan hibrid yang menggunakan fitur URLLength dan IsDomainIP. Hasil visualisasi melalui PCA dan t-SNE menunjukkan pemisahan klaster yang sangat jelas, mengonfirmasi bahwa kombinasi sederhana dari dua fitur dapat secara efektif membedakan URL phishing dari URL normal. Penelitian ini membuktikan bahwa K-Means Clustering menawarkan solusi yang lebih adaptif dibandingkan metode berbasis daftar hitam dalam deteksi phishing, dengan kemampuan mengenali pola serangan baru tanpa memerlukan data berlabel.
PERBANDINGAN METODE TRANSFER LEARNING DALAM KLASIFIKASI PENYAKIT DAUN PADI Aldi Daffa Arisyi; Muhammad Aidil Saputra; Muhammad Rafif Hanif; Anindita Septiarini; Akhmad Irsyad
Jurnal Ilmiah Informatika Vol. 11 No. 1 (2026): Jurnal Ilmiah Informatika
Publisher : Department of Science and Technology Ibrahimy University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35316/.v11i1.24-34

Abstract

This study compares four transfer learning-based CNN models, namely VGG19, ResNet152, MobileNetV2, and DenseNet121, for the classification of 10 classes of rice leaf diseases. Evaluation results on the test dataset show that ResNet152 achieves the best performance with an accuracy of 0.9553, precision of 0.9589, recall of 0.9553, and F1-score of 0.9558, followed by DenseNet121 (accuracy 0.9433), MobileNetV2 (0.9353), and VGG19 (0.9247). ResNet152 excels in recognizing complex features through its skip connection mechanism, while DenseNet121 is more efficient with the lowest validation loss. MobileNetV2 is the lightest and fastest model, making it suitable for resource-limited devices. Based on the confusion matrix analysis, all models are able to classify the neck blast class perfectly; however, misclassifications still occur among visually similar classes such as brown spot, narrow brown spot, and leaf blast. Overall, transfer learning is proven effective for rice leaf disease classification, with ResNet152 and DenseNet121 being the most recommended models.
Co-Authors Aldi Daffa Arisyi Anindita Septiarini, Anindita Davina Putri Ananta Haviluddin Haviluddin Irsyad, Akhmad Muhammad Aidil Saputra Sitompul, Tua Delima Wati, Masna