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All Journal Teika Electro Luceat Jurnal CoreIT CogITo Smart Journal Jurnal Komtika (Komputasi dan Informatika) MATRIK : Jurnal Manajemen, Teknik Informatika, dan Rekayasa Komputer Jurnal Teknologi Dan Sistem Informasi Bisnis Informatics and Digital Expert (INDEX) J-Icon : Jurnal Komputer dan Informatika Riwayat: Educational Journal of History and Humanities Masyarakat: Jurnal Pengabdian Jurnal Komtika (Komputasi dan Informatika)
Sihotang, Jay Idoan
Universitas Advent Indonesia
Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Social Sciences Other

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Journal : Jurnal CoreIT

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Mesin Rekomendasi Menggunakan Algoritma Alternating Least Square (ALS) pada Goodreads Martin, Stanley; Sihotang, Jay Idoan; Jonathan, Bern
Jurnal CoreIT: Jurnal Hasil Penelitian Ilmu Komputer dan Teknologi Informasi Vol 6, No 2 (2020): Desember 2020
Publisher : Fakultas Sains dan Teknologi, Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (562.54 KB) | DOI: 10.24014/coreit.v6i2.11578

Abstract

Sistem rekomendasi merupakan sistem yang dapat memberikan rekomendasi berupa prediksi rating pada suatu item. Ada banyak cara dalam merekomendasikan suatu item kepada pengguna, salah satunya adalah Alternating Least Square. Goodreads adalah situs web buku yang menjelaskan sinopsis dan memberi peringkat untuk buku, dan Goodreads membagikan peringkat pengguna mereka ke item di Kaggle untuk dianalisis. Oleh karena itu, penulis ingin merancang, mengimplementasikan, menguji serta ingin mengevaluasi mesin rekomendasi buku Goodreads mulai dari rating pengguna hingga item sebagai alternatif pemecahan masalah dari rekomendasi peringkat buku di Goodreads sekarang ini. Terdapat 981.756 data yang diolah menggunakan Alternating Least Square dengan 80% data latih dan 20% data uji. Hasil prediksi dievaluasi dengan Mean Absolute Error (MAE) dan Root Mean Square Error (RMSE). Hasil penelitian ini menunjukkan bahwa Root Mean Square Error 0.67 dan Mean Absolute Error 0.52 dan dapat dikatakan mesin yang dibuat memiliki error varians yang kecil karena memiliki kesalahan di bawah 1.00.
Utilization Of Privilege Escalation Vulnerability In Manipulating Administrator Access Of PT XYZ Ritonga, Jody Jeremi Hadrian; Sihotang, Jay Idoan
Jurnal CoreIT: Jurnal Hasil Penelitian Ilmu Komputer dan Teknologi Informasi Vol 11, No 1 (2025): June 2025
Publisher : Fakultas Sains dan Teknologi, Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/coreit.v11i1.32985

Abstract

PT.XYZ is a CRM solutions provider that helps businesses manage their interactions with customers. Through in-depth research, a security vulnerability was discovered on PT.XYZ's platform that could be exploited by unauthorized parties to escalate their access rights unlawfully. This research involved a comprehensive analysis of CRM system. The research method included application analysis, exploitation, impact evaluation, solution development, and reporting. The findings revealed a vulnerability in the user management mechanism, allowing a regular user to escalate their access rights to an administrator level. This could potentially lead to customer data misuse, operational disruptions, and financial losses for the company. The research process involved penetration testing, impact analysis, and the development of mitigation solutions. Thanks to these findings, PT.XYZ has implemented system improvements to address the security gap. This research demonstrates the importance of conducting regular security testing to ensure a company's information systems remain protected from cyber threats.
Co-Authors Abraham Butar-butar Andrew Fernando Pakpahan Bangun, Winda Ebina Br Danielle Eudora Crystle Rampen Elmor Benedict Wagiu Erienika Meiling Lompoliu Gabriel Putra Advent Yakop Sihombing Ivan Royanto Hutabarat Jacko Pastorius Jessica Sabbathiny Buyung Jimmy H Moedjahedy Joe Yuan Mambu Jonathan, Bern Martin, Stanley Mendrofa, Seprianto Michelle Cantika Pontoan Oktiviana Perangin-angin Purba, Antonius Radja Boy Rawlson Yoshua Limbong Raymond Maulany Rianti Ruth Florenza Tambunan Ritonga, Jody Jeremi Hadrian Shaan, Peter Sianturi, Arli Hope Valerian Leony Bianto Winda Ebina Br Bangun Wiranto Horsen Silitonga Yang, Marvel Zefanya