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All Journal Jurnal Sistem Komputer Sistemasi: Jurnal Sistem Informasi Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Syntax Literate: Jurnal Ilmiah Indonesia Sebatik JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) Journal of Information Systems and Informatics Aiti: Jurnal Teknologi Informasi Jurasik (Jurnal Riset Sistem Informasi dan Teknik Informatika) Journal of Information Technology Ampera Journal of Computer and Information Systems Ampera JITSI : Jurnal Ilmiah Teknologi Sistem Informasi JUSTIN (Jurnal Sistem dan Teknologi Informasi) International Journal Software Engineering and Computer Science (IJSECS) Malcom: Indonesian Journal of Machine Learning and Computer Science
Ariya Dwika Cahyono
Universitas Kristen Satya Wacana
Humanities Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Other

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SIOLGA Information Technology Risk Management Analysis Using ISO 31000 Mamuaja, Hizkia Brayn Minggos; Cahyono, Ariya Dwika
Journal of Information System and Informatics Vol 6 No 1 (2024): March
Publisher : Universitas Bina Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51519/journalisi.v6i1.641

Abstract

Salatiga City Disperinnaker, a government agency focusing on industry and labor, has developed the Salatiga Job Vacancy Information System (SIOLGA) to streamline its operations. As the SIOLGA application has recently completed its development phase, there arises a necessity for robust risk management to anticipate potential threats and vulnerabilities. Employing ISO 31000 standards, the research aims to mitigate risks effectively. The ISO 31000 framework encompasses risk identification, analysis, evaluation, and treatment phases. Through this process, the study identified 18 potential risks within the SIOLGA application, categorized into three levels: high, medium, and low. Specifically, there are 5 high-level risks, 10 medium-level risks, and 3 low-level risks. By implementing rigorous risk management strategies, the expectation is for the SIOLGA application to operate more efficiently and optimally, fulfilling its intended objectives.
Information Technology Governance Analysis using COBIT 2019 Framework in Salatiga City Community and Civil Services Naibaho, Epson Briantama; Cahyono, Ariya Dwika
Journal of Information System and Informatics Vol 6 No 2 (2024): June
Publisher : Universitas Bina Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51519/journalisi.v6i2.734

Abstract

Information Technology (IT) is an important part of its value both in terms of investment and intangible potential for an organization in its operational life. The use of IT in government sector organizations, in order to provide services to the public, as well as managing government running mechanisms including interactions with citizens is known as E-Government. The essence of e-Government is efficiency, transparency, public participation and responsiveness of government institutions. The Salatiga City Community and Civil Services is one of the Salatiga city government agencies which is engaged in public services in the field of civil data collection, making IT a supporting component of constitutional management in improving the efficiency of work flows and processes in public services. In order to create efficiency and improve performance in the IT sector, good governance is needed, as well as decision making in the IT sector. Therefore, it requires evaluation and recommendations regarding governance and decision making in the IT sector. Based on this research, recommendations for 5 process domains are provided as a reference as an effort to improve the Information Technology Governance of the Salatiga City Community and Civil Services.
ANALISIS PENERIMAAN APLIKASI FINTECH DENGAN HEDONIC MOTIVATION SYSTEM ADOPTION MODEL Nugraha, Bintang Satria; Cahyono, Ariya Dwika
JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) Vol 10, No 2 (2025)
Publisher : STKIP PGRI Tulungagung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/jipi.v10i2.6072

Abstract

Perkembangan teknologi dan inovasi di sektor keuangan menciptakan fintech. Aplikasi fintech merupakan salah satu bentuk fintech yang membuka akses layanan keuangan untuk semua kalangan dan berkontribusi positif terhadap pertumbuhan ekonomi yang inklusif. Namun penerimaan aplikasi fintech di Indonesia masih rendah. Dalam penerimaan teknologi faktor intrinsik memiliki peran penting. Untuk mengatasi permasalahan tersebut dilakukan penelitian analisis penerimaan aplikasi fintech dengan tujuan mengetahui faktor yang mempengaruhi niat dalam penggunaan dan imersi pengguna saat menggunakan aplikasi fintech berdasarkan kerangka teoritis HMSAM (Hedonic Motivation System Adoption Model). Penelitian ini menggunakan metode kuantitatif dengan kuesioner sebagai metode pengumpulan data. Data yang dikumpulkan dianalisis secara statistik dengan metode SEM-PLS menggunakan aplikasi SmartPLS v3.2.9. Hasil penelitian menunjukkan niat dalam penggunaan aplikasi fintech dipengaruhi secara signifikan oleh persepsi kemudahan penggunaan, kontrol, kebahagiaan, dan persepsi kegunaan. Sedangkan imersi pada aplikasi fintech dipengaruhi secara signifikan oleh persepsi kemudahan penggunaan, keingintahuan, kebahagiaan, dan kontrol. Hasil penelitian ini juga menunjukkan keingintahuan tidak berpengaruh signifikan terhadap niat dalam penggunaan aplikasi fintech.
Analisis X Sebagai Platform Media Sosial Terhadap Experience Pengguna Menggunakan Metode User Experience Questionnaire: Analysis of X as a Social Media Platform for User Experience Using the User Experience Questionnaire Method Ferdianto, Yordan; Cahyono, Ariya D
MALCOM: Indonesian Journal of Machine Learning and Computer Science Vol. 4 No. 4 (2024): MALCOM October 2024
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/malcom.v4i4.1590

Abstract

Akuisisi platform X (sebelumnya dikenal sebagai Twitter) oleh Elon Musk pada tahun 2022 menimbulkan perubahan signifikan yang memengaruhi pengalaman pengguna dan masa depan platform ini. Penelitian ini bertujuan untuk mengevaluasi dampak dari perubahan tersebut terhadap kualitas layanan X, dengan menggunakan User Experience Questionnaire (UEQ) sebagai alat evaluasi. Fokus penelitian terletak pada aspek attractiveness, perspicuity, efficiency, dependability, stimulation, dan novelty dalam layanan X. Hasil evaluasi menunjukkan bahwa meskipun X telah memberikan pengalaman pengguna yang memuaskan, dengan nilai attractiveness 1,66, efficiency 1,60, dependability  1,60, dan stimulation 1,66, terdapat ruang untuk peningkatan dalam aspek perspicuity dengan nilai 1,58 dan novelty yang hanya memperoleh nilai 0,79. Temuan ini menegaskan pentingnya penilaian pengalaman pengguna yang komprehensif dan spesifik. Penelitian masa depan sebaiknya mengeksplorasi metode evaluasi yang beragam untuk memperdalam pemahaman tentang kualitas layanan X dan kepuasan pengguna.
Analisis Risiko Penggunaan Program ESPK PT Konimex Sukoharjo Dengan Metode Octave Allegro: Penerapan Manajemen Risiko dalam Kalibrasi Program ESPK: Peningkatan Mutu di Industri Farmasi Santoso, Yohanes Marcellino; Dwika Cahyono, Ariya
JITSI : Jurnal Ilmiah Teknologi Sistem Informasi Vol 5 No 4 (2024)
Publisher : SOTVI - Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62527/jitsi.5.4.295

Abstract

This study analyzes the risks associated with the ESPK (Electronic Calibration Request) Program at PT Konimex Sukoharjo using the Octave Allegro method. The ESPK program is utilized for calibration processes, and the research aims to determine whether the program poses potential risks to the company. The Octave Allegro method is used to evaluate threats and information security risks, enabling the organization to make decisions based on risks to the confidentiality, integrity, and availability of critical information assets. Data obtained indicate a Relative Risk Score of 28, meaning the risks can be mitigated or postponed. The findings involve users of the ESPK program, such as calibration admins, validation officers, calibration technicians, information system managers, and the owners of calibrated equipment. Key risks identified include data input errors, server downtime or maintenance during working hours, and incomplete program features. All these risks can either be mitigated or postponed. In conclusion, PT Konimex has not previously conducted a risk analysis on the ESPK program, and the Octave Allegro method identifies threats and risks for better protection of information assets.
Comparative Analysis of Linear Regression and Neural Network Algorithms for Stock Price Prediction Wibowo, Eldrianto Christian; Cahyono, Ariya Dwika
Sistemasi: Jurnal Sistem Informasi Vol 14, No 4 (2025): Sistemasi: Jurnal Sistem Informasi
Publisher : Program Studi Sistem Informasi Fakultas Teknik dan Ilmu Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v14i4.5325

Abstract

This study compares the performance of Linear Regression and Neural Network algorithms in predicting stock prices using historical data from PT Bank Central Asia Tbk (BBCA) for the period from January 1, 2019, to February 17, 2025. The dataset includes daily open, high, low, and close prices, as well as trading volume. Linear Regression is employed as a conventional statistical approach, while Neural Networks are applied as a machine learning method based on deep learning. Performance evaluation is conducted using three error metrics: Mean Absolute Error (MAE), Mean Squared Error (MSE), and Root Mean Squared Error (RMSE). The experimental results show that the Linear Regression model consistently produces more accurate predictions with lower error values compared to the Neural Network. Although Neural Networks are more flexible in capturing non-linear patterns, Linear Regression demonstrates greater stability under market conditions present in the observed data period.
Implementation of Zero-Knowledge Encryption in a Web-Based Password Manager Darmawan, R. Krisviarno; Cahyono, Ariya Dwika
International Journal Software Engineering and Computer Science (IJSECS) Vol. 5 No. 2 (2025): AUGUST 2025
Publisher : Lembaga Komunitas Informasi Teknologi Aceh (KITA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/ijsecs.v5i2.4207

Abstract

-The secure management of account credentials presents a considerable challenge in the digital era, as many users continue to engage in unsafe practices such as password reuse. Conventional password managers typically store encrypted data on servers, which introduces risks if those servers are compromised. This study develops a web-based password manager that implements Zero-Knowledge Encryption (ZKE), ensuring that all essential cryptographic operations are executed exclusively on the client side (browser). Employing a client-server architecture (React frontend, Python/FastAPI backend), the system derives encryption keys from the user’s master password using Argon2id (4 iterations, 64 MB memory, 1 parallelism), and performs credential data encryption and decryption with AES-GCM entirely on the client side. The server is limited to receiving and storing encrypted data (verifier, salt, data blobs), without ever accessing the master password or plaintext credentials. Network payload analysis conducted with Chrome DevTools confirms that the ZKE implementation effectively prevents the exposure of sensitive data to the server. This approach substantially improves data privacy and security against server-side threats. Nevertheless, the ZKE model lacks an account recovery feature, placing full responsibility on users to protect their master passwords—a trade-off that underscores the need for further investigation into ZKE-compatible recovery mechanisms.
User Experience Questionnaire (UEQ) Untuk Menilai Pengalaman Pengguna TikTok Shop Prasetyo, Rochy Fajar; Cahyono, Ariya Dwika
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i9.61571

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengalaman pengguna TikTok Shop dengan menggunakan metode User Experience Questionnaire (UEQ). TikTok Shop merupakan platform e-commerce yang menggabungkan fitur video pendek dengan layanan belanja daring. Metode yang digunakan dalam penelitian ini adalah metode kuantitatif, dengan pendekatan survei melalui kuesioner dan observasi langsung terhadap aplikasi TikTok Shop pada versi Android dan iOS. Penelitian dilakukan melalui beberapa tahapan, yaitu: melakukan studi literatur terhadap penelitian sebelumnya, mengidentifikasi masalah, menentukan sampel yang terdiri atas 100 pengguna aktif TikTok Shop berusia 18–25 tahun, menyusun instrumen pertanyaan, menyebarkan kuesioner, melakukan uji reliabilitas, menganalisis data menggunakan UEQ Analysis Tools, serta menyusun kesimpulan dan saran. Hasil penelitian menunjukkan bahwa kualitas pengalaman pengguna secara keseluruhan tergolong sangat baik, dengan skor tinggi pada enam skala UEQ, yaitu: Attractiveness (1,65), Perspicuity (1,81), Efficiency (1,62), Dependability (1,57), Stimulation (1,63), dan Novelty (1,31). Skor tertinggi diperoleh pada skala Perspicuity (1,81), yang menunjukkan bahwa antarmuka dan fitur TikTok Shop mudah dipahami dan digunakan oleh pengguna, serta menyediakan navigasi yang intuitif sehingga memudahkan proses transaksi.
Designing Chatbot Interface to Accelerate Services at Disdukcapil Salatiga Sheviana, Laela Sheviana; Cahyono, Ariya Dwika
Sistemasi: Jurnal Sistem Informasi Vol 14, No 6 (2025): Sistemasi: Jurnal Sistem Informasi
Publisher : Program Studi Sistem Informasi Fakultas Teknik dan Ilmu Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v14i6.5596

Abstract

Managing population documents such as lost or damaged ID cards (KTP) and Family Cards (KK) remains a challenge for the public due to complex procedures, lengthy processing times, and limited access to information. This study aims to design a chatbot interface to simplify the document management process using a Design Thinking approach focused on user needs. Design Thinking consists of five stages: Empathize (identifying user problems), Define (formulating the core issues), Ideate (generating solution ideas), Prototype (creating initial designs), and Test (evaluating the solution). The prototype was tested on 37 respondents to assess its quality. The analysis results show that the average score for all statements ranged between 3 and 4, indicating positive feedback on the design. All items were validated with an r-count value > 0.3, with the highest value being 0.864, while the reliability test produced a Cronbach’s Alpha of 0.863, demonstrating excellent internal consistency. Overall, the chatbot was considered effective, user-friendly, and capable of supporting digital transformation at the Civil Registry Office (Disdukcapil). The trial also indicated a potential increase in user satisfaction of up to 85% and a 60% improvement in information retrieval efficiency compared to conventional methods. These findings suggest the proposed solution as a viable digital alternative to accelerate services, reduce queues, and enhance transparency and public satisfaction.
Pengembangan Aplikasi Mobile Goods Receipt Menggunakan Framework Flutter di Perusahaan Suku Cadang Otomotif Sinaga, Brigita Kiana Kirara; Haryani, Endang; Cahyono, Ariya Dwika
JUSTIN (Jurnal Sistem dan Teknologi Informasi) Vol 13, No 4 (2025)
Publisher : Jurusan Informatika Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/justin.v13i4.92891

Abstract

Penelitian ini bertujuan untuk mengembangkan aplikasi penerimaan barang berbasis mobile di PT XYZ. Penelitian didorong oleh permasalahan penerimaan barang yang selama ini masih dilakukan secara manual, yaitu tingginya potensi kesalahan pencatatan, keterlambatan dalam proses, dan ketidakakuratan data stok. Pengembangan Goods Receipt Application (GR App) ini menggunakan metode prototipe serta memanfaatkan framework Flutter dan integrasi ke sistem SAP melalui API agar proses pencatatan dapat dilakukan secara real-time. Evaluasi dilakukan melalui uji fungsional untuk memastikan seluruh fitur aplikasi berjalan sesuai kebutuhan, mulai dari pengelolaan Order Sheet, Surat Jalan, pemindaian QR Tag, hingga pengiriman data ke SAP. Evaluasi juga dilakukan untuk mengukur efisiensi aktifitas sebelum dan sesudah penggunaan aplikasi. Hasil pengujian dan evaluasi menunjukkan bahwa seluruh fungsi utama telah berjalan dengan baik tanpa ditemukan kesalahan kritis. Penerapan aplikasi ini mempermudah proses pencatatan penerimaan barang, meningkatkan akurasi data, serta mempercepat alur kerja operasional di PT XYZ. Dengan demikian, sistem ini tidak hanya menggantikan prosedur manual, tetapi juga menghadirkan proses penerimaan barang yang lebih efisien dan terintegrasi. Selain implikasi praktis tersebut, penelitian ini juga memberikan kontribusi ilmiah pada perkembangan literatur dan referensi di bidang sistem informasi logistik, khususnya pada perusahaan manufaktur, serta menjadi penelitian terapan rujukan untuk alternatif pengembangan aplikasi yang terintegrasi dengan sistem SAP.
Co-Authors Adi Nugroho Adi Nugroho Agustinus Fritz Wijaya Anis Setia Wati Darmawan, R. Krisviarno Dian Elvana Purnama Endang Haryani Evi Maria Ferdianto, Yordan Fierco Marion Mainassy Grialdo Willy Lantang Krisdana Bima Mahardika Mamuaja, Hizkia Brayn Minggos Melkior N.N. Sitokdana Naibaho, Epson Briantama Nathanael Julian Budiono Nugraha, Bintang Satria Penidas Fodinggo Tanaem Prasetyo, Rochy Fajar Ryan Haryo Pangestu Santoso, Yohanes Marcellino Sheviana, Laela Sheviana Sinaga, Brigita Kiana Kirara Stefan Agustinus Teguh Wahyono Wibowo, Eldrianto Christian