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All Journal Journal of Computer Science and Informatics Engineering Cosmic Jurnal Teknik
Azmi, Khoiratul
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

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Penerapan Data Mining Menggunakan Clasifcasion Untuk Potensi Biaya Pajak Azmi, Khoiratul; Evioni, Aninda
Journal of Computer Science and Informatics Engineering Vol 4 No 1 (2025): Januari
Publisher : Ali Institute of Research and Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55537/cosie.v4i1.990

Abstract

Increasing tax revenue is one of the government's main focuses in development efforts. One way to maximize tax revenue is to identify potential tax costs that have not been ideally explored. In this study, information mining techniques are applied with the classification method to predict and identify taxpayers who have the potential for high tax costs. By using historical taxpayer information, the classification method is able to group taxpayer information into certain categories that are useful for further analysis. The results of this study are expected to provide information-based recommendations to tax authorities in order to improve the efficiency of tax collection.
Aplikasi Simulasi Enkripsi Menggunakan Metode Caesar Cipher Berbasis Website Sinaga, Fiqri Dian Priyatna; Azmi, Khoiratul; Nasution, Afri Yunda; Nanda, Rivaldi Prima; Rusydi, Ibnu
Cosmic Jurnal Teknik Vol 2 No 4 (2025): November
Publisher : Ali Institute or Research and Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55537/cosmic.v2i4.1466

Abstract

Cryptography is a fundamental field in data security; however, it is often considered difficult for beginner students due to its abstract and mathematical nature. Previous studies indicate that learning Caesar Cipher is commonly conducted through theoretical approaches or desktop-based applications with limited interactivity and accessibility. Therefore, this study aims to develop a web-based Caesar Cipher encryption simulation application as an interactive learning medium. The system was developed using the prototype method, while functional testing was conducted using the black box testing approach. The effectiveness of the application was evaluated through primary data collected through questionnaires distributed to students. The results show that before using the application, 82.4% of students were at low to moderate levels of understanding, whereas after using the application, 100% of students reached a high level of understanding. These findings indicate that the web-based Caesar Cipher simulation application is effective in improving students’ understanding of fundamental cryptographic concepts prior to studying more advanced data security algorithms
Co-Authors Evioni, Aninda Ibnu Rusydi Nanda, Rivaldi Prima Nasution, Afri Yunda Sinaga, Fiqri Dian Priyatna