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All Journal International Journal of Electrical and Computer Engineering International Journal of Advances in Applied Sciences TELKOMNIKA (Telecommunication Computing Electronics and Control) EXPERT: Jurnal Manajemen Sistem Informasi dan Teknologi Biotropika Jurnal Informatika Jurnal Informatika Prosiding Seminar Nasional Darmajaya Jurnal Pengabdian kepada Masyarakat Nusantara Journal of Food System and Agribusiness (JoFSA) Internet of Things and Artificial Intelligence Journal Proceeding Applied Business and Engineering Conference Bulletin of Network Engineer and Informatics (BUFNETS) ROUTERS: Jurnal Sistem dan Teknologi Informasi Jurnal Ilmiah ESAI
Putra, Septafiansyah Dwi
Politeknik Negeri Lampung
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Autentikasi User Dengan Metode Single Sign-On Berbasis Windows Active Directory Pada PT. XYZ Kemas, Kemas Ocha Khairi Saputra; Supriyatna, Agiska Ria; Putra, Septafiansyah Dwi
ROUTERS: Jurnal Sistem dan Teknologi Informasi Vol. 2 No. 2, Juli 2024
Publisher : Program Studi Teknologi Rekayasa Internet, Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/rt.v2i2.3328

Abstract

To connect to the company network, a WPA2-PSK-based security system is in place, requiring users to input the company Wi-Fi password. One of the issues that arises is the difficulty in identifying the status of users attempting to access the network. Apart from security concerns regarding the network, the use of this security key allows non-employees to connect to the network using personal devices. As a solution to enhance the existing authentication system, security systems like RADIUS can be utilized. This system operates to mitigate threats to the network security. The process undertaken through the implementation of this NDLC method commences with identifying and designing network security authentication, progressing through the implementation phase until the design can be regularly utilized. With the introduction of a user authentication system employing a single sign-on method based on Windows Active Directory at XYZ Inc., users will find it easier to connect to the wireless network. With WPA2-Enterprise, access to the network will be restricted.
Analisis terhadap Enkripsi Data SSL di MySQL: Menguji Keamanan In-Transit Haikal, Antoni; Putra, Septafiansyah Dwi; Nelmiawati, Nelmiawati
ROUTERS: Jurnal Sistem dan Teknologi Informasi Vol. 2 No. 2, Juli 2024
Publisher : Program Studi Teknologi Rekayasa Internet, Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/rt.v2i2.3446

Abstract

Data transmission security has become a pivotal point in database management, especially in response to the evolving cyber threats. This study examines a critical aspect of data security: the in-transit data encryption using Secure Sockets Layer (SSL) within MySQL. The main focus of the research is on testing data encryption by employing Wireshark, a network analysis tool capable of capturing and displaying transmitted data packets. The testing process consisted of two scenarios: first, data transmission with SSL enabled on the MySQL server; second, data transmission without the use of SSL. The results show a significant contrast between the two scenarios. With SSL, the data packets intercepted by Wireshark appeared unreadable, indicating that encryption was successful in preventing data content exposure. Conversely, without SSL, the data packets could be read as plain text, demonstrating a lack of encryption and a high security risk. This research delves only into the aspect of in-transit data encryption security in MySQL and does not explore the implications related to SSL performance or configuration further. This analysis offers a useful perspective for database administrators in efforts to enhance data security, identifying SSL as a crucial tool to ensure the security of in-transit data.
Design and Performance Analysis of a Fuzzy Logic-Based IoT System for Greenhouse Irrigation Control Ambarwari, Agus; Widyawati, Dewi Kania; Putra, Septafiansyah Dwi
Internet of Things and Artificial Intelligence Journal Vol. 4 No. 3 (2024): Volume 4 Issue 3, 2024 [August]
Publisher : Association for Scientific Computing, Electronics, and Engineering (ASCEE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31763/iota.v4i3.764

Abstract

Automatic irrigation has long been used to efficiently irrigate large agricultural areas through drip irrigation systems to minimize water wastage. In greenhouse irrigation, computerized control is essential to improve productivity, as conventional control methods that rely on on-off or proportional control are often inefficient. This research introduces a novel approach to monitor greenhouse environmental conditions and control irrigation duration. The monitoring system architecture consists of sensor nodes and a gateway. The irrigation duration control uses a Fuzzy Logic Controller (FLC) based on the Mamdani method. The FLC is implemented on a NodeMCU ESP8266 board integrated with a DHT22 sensor and a soil moisture sensor. Temperature and soil moisture parameters are used as inputs for the fuzzy logic system in determining the appropriate irrigation duration. The linguistic variables used in the fuzzy membership function include soil moisture (categorized as water, wet, and dry), temperature (categorized as cold, normal, and hot), and watering time (categorized as zero, short, medium, and long). A rule base consisting of nine fuzzy rules was developed based on these membership functions. Experimental results show that the FLC implemented on the NodeMCU ESP8266 has an average accuracy of 99.41% compared to the MATLAB simulation. This shows the fuzzy logic-based system's high accuracy and effectiveness in controlling the duration of greenhouse irrigation. This developed system offers a promising solution to optimize water usage and improve irrigation management in a greenhouse environment.
Comparative Analysis of Filtering Techniques for Efficient Data Aggregation in Smart Hydroponic Systems Qomariyah, Nurul; Putra, Septafiansyah Dwi; Asrowardi, Imam
ABEC Indonesia Vol. 12 (2024): 12th Applied Business and Engineering Conference
Publisher : Politeknik Negeri Bengkalis

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The rapid evolution of digital technologies has transformed traditional agriculture into a more efficient andintelligent system. This study focuses on the development of a data aggregation strategy in Smart Hydroponic Systems tooptimize network consumption without sacrificing data accuracy. By utilizing Threshold Filtering and Delta-BasedFiltering techniques, significant reductions in data transmission were achieved while maintaining essential temperaturemonitoring capabilities. Experimental results demonstrated that both techniques effectively reduced data points andoptimized bandwidth usage, particularly in temperature-stable environments. This research contributes to theadvancement of sustainable digital agriculture by providing an efficient approach to managing network resources in IoTbasedhydroponicsystems.
Analisis Kerentanan Aplikasi Web E-commerce Berdasarkan Standar OWASP Top 10: Studi Kasus pada Situs Kopi Lampung Nusantara Supriyatna, Agiska Ria; Asrowardi, Imam; Putra, Septafiansyah Dwi; Subyantoro, Eko
EXPERT: Jurnal Manajemen Sistem Informasi dan Teknologi Vol 14, No 2 (2024): December
Publisher : Universitas Bandar Lampung (UBL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36448/expert.v14i2.4034

Abstract

Penelitian ini bertujuan untuk menganalisis kerentanan keamanan pada aplikasi web e-commerce Kopi Lampung Nusantara menggunakan standar Open Web Application Security Project (OWASP) sebagai acuan utama. Standar OWASP Top 10 diterapkan untuk mengidentifikasi jenis-jenis kerentanan paling umum yang memiliki risiko tinggi terhadap aplikasi web. Metode penelitian melibatkan pengujian penetrasi yang bertujuan untuk mengungkap potensi celah keamanan yang dapat mengancam keamanan data pengguna serta integritas sistem. Hasil pengujian menunjukkan adanya beberapa kerentanan kritis, termasuk PII Disclosure yang berisiko terhadap privasi pengguna, absennya Anti-CSRF Tokens yang meningkatkan risiko serangan Cross-Site Request Forgery (CSRF), serta kurangnya header keamanan seperti Content Security Policy (CSP) dan X-Content-Type-Options. Temuan ini menggarisbawahi pentingnya penerapan standar keamanan OWASP dalam pengembangan dan pemeliharaan aplikasi web, terutama pada sektor e-commerce yang rentan terhadap serangan siber.
Pelatihan Pemasaran Digital Pada UMKM Dapur Omah Cinta: Langkah Menuju Transformasi Digital Zuriati, Zuriati; Subyantoro, Eko; Asrowardi, Imam; Dwi Putra, Septafiansyah
Jurnal Pengabdian kepada Masyarakat Nusantara Vol. 5 No. 4 (2024): Jurnal Pengabdian kepada Masyarakat Nusantara (JPkMN) Edisi September - Desembe
Publisher : Lembaga Dongan Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/jpkmn.v5i4.4843

Abstract

Digitalisasi UMKM merupakan langkah strategis untuk meningkatkan daya saing di tengah tantangan globalisasi dan persaingan pasar yang semakin ketat. Kegiatan Pengabdian Kepada Masyarakat (PKM) Inovokasi ini bertujuan untuk mempercepat transformasi digital UMKM Dapur Oma Cinta melalui pelatihan pemasaran digital yang terstruktur. Permasalahan utama yang dihadapi UMKM ini adalah keterbatasan akses pasar dan kurangnya optimalisasi teknologi digital dalam pemasaran produk. Metode yang digunakan meliputi tahapan persiapan, pelaksanaan, monitoring, dan evaluasi. Pada tahap persiapan, tim menyusun materi pelatihan dan menyiapkan sarana pendukung. Tahap pelaksanaan dilakukan melalui sesi pelatihan interaktif dan pendampingan langsung yang mencakup pengelolaan website e-commerce, marketplace, media sosial, dan strategi pembuatan konten digital. Evaluasi keberhasilan dilakukan melalui pre-test dan post-test untuk mengukur peningkatan kemampuan peserta. Hasil menunjukkan peningkatan signifikan dalam pemahaman dan keterampilan peserta terkait pemasaran digital. Rata-rata peningkatan skor post-test peserta mencapai 66,84%, dengan peningkatan terbesar pada peserta dengan pengetahuan awal yang rendah. Temuan penting menunjukkan bahwa pelatihan ini berhasil membantu UMKM memperluas jangkauan pasar, meningkatkan efektivitas promosi, dan memperkuat daya saing di pasar lokal. Kesimpulannya, program ini tidak hanya mendukung transformasi digital UMKM Dapur Oma Cinta tetapi juga memberikan model pelatihan yang dapat direplikasi untuk UMKM lain di Indonesia. Transformasi digital yang dicapai melalui kegiatan ini berpotensi besar untuk meningkatkan pendapatan dan keberlanjutan usaha mitra dalam jangka panjang.
Identifikasi Faktor Penentu Kerawanan Pangan melalui Model Prediktif Random Forest: Studi Regional di Provinsi Lampung Utomo, Feri; Fitriani, Fitriani; Dwi Putra, Septafiansyah; Noer, Irmayani
Journal of Food System & Agribusiness Volume 9 Nomor 2 Tahun 2025
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jofsa.v9i2.4467

Abstract

Kerawanan pangan masih menjadi persoalan serius di Provinsi Lampung meskipun wilayah ini dikenal sebagai salah satu sentra produksi pangan nasional. Kontradiksi antara surplus produksi padi, jagung, dan ubi kayu di tingkat makro dengan masih tingginya rumah tangga yang mengalami kerawanan pangan menunjukkan adanya kesenjangan dalam distribusi, akses, dan pemanfaatan pangan. Penelitian ini bertujuan untuk mengidentifikasi faktor-faktor penentu kerawanan pangan melalui penerapan model prediktif machine learning, khususnya algoritma Random Forest. Data sekunder diperoleh dari Badan Pusat Statistik (BPS) periode 2014–2024 dengan variabel dependen Produk Domestik Regional Bruto (PDRB) sebagai indikator kesejahteraan masyarakat, serta 13 variabel independen yang merepresentasikan aspek dan ketahanan pangan, sosial, dan ekonomi. Hasil evaluasi model menunjukkan performa yang kuat dengan nilai Mean Squared Error (MSE) sebesar 12.830.318 dan koefisien determinasi (R²) sebesar 0,899, yang menandakan kemampuan prediksi tinggi dan kesalahan relatif rendah. Uji feature importance mengungkap bahwa variabel Produksi Padi (0,3743) dan Luas Panen Padi (0,3415) merupakan determinan paling dominan, diikuti oleh Pengeluaran per Kapita Disesuaikan (0,1086) dan Persentase Penduduk Miskin (0,0713). Indikator pembangunan manusia dan ketenagakerjaan berkontribusi lebih kecil, sementara variabel lainnya relatif marginal. Temuan ini menegaskan bahwa pertumbuhan ekonomi daerah masih ditentukan oleh margin ekstensif berupa luasan dan volume produksi padi, sehingga rentan terhadap alih fungsi lahan maupun guncangan iklim. Rekomendasi kebijakan meliputi perlindungan lahan sawah, modernisasi irigasi, intensifikasi berkelanjutan, penguatan daya beli, serta peningkatan kualitas sumber daya manusia untuk mendorong ketahanan pangan yang lebih inklusif dan berkelanjutan di Lampung.
Evaluating the Limitations of English Lexicon-Based Sentiment Analysis for Indonesian E-Wallet Reviews: A Comparison of VADER and Indonesian RoBERTa Imam asrowardi; Septafiansyah Dwi Putra; Nadia Nabiha Dziqra
Bulletin of Network Engineer and Informatics Vol. 4 No. 1 (2026): BUFNETS (Bulletin of Network Engineer and Informatics) April 2026
Publisher : PT. GWEX NET PUBLISHER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59688/738289

Abstract

Sentiment analysis of mobile application reviews supports service evaluation in the fast-growing Indonesian digital finance sector. This study compared an English lexicon-based method (VADER) with a fine-tuned Indonesian RoBERTa model on 1,000 reviews of the DANA e-wallet application collected from Google Play. Following best practice for transformer models, reviews were classified primarily from their original (raw) text, and a preprocessed variant was used to assess the effect of text cleaning. On raw text, VADER labelled 903 reviews as neutral, 78 as positive, and 19 as negative, whereas Indonesian RoBERTa produced 494 positive, 385 negative, and 121 neutral, a positive-leaning distribution consistent with the sample's mean rating of 4.06. Inter-method agreement was negligible (Cohen's kappa = 0.008). Removing stopwords and numbers before classification changed 30.2% of the RoBERTa labels and flattened its distribution, confirming that such preprocessing degrades the contextual input transformers rely on, while leaving VADER almost unchanged. Because no human-annotated gold standard was used, the reported figures reflect inter-method agreement rather than absolute accuracy against human labels. The findings show that VADER is unsuitable for Indonesian reviews and that language-specific transformers should be applied to unprocessed text.
Predictive modeling of regional economic growth using agricultural and socioeconomic indicators Septafiansyah Dwi Putra; Feri Utomo; Fitriani Fitriani; Irmayani Noer; Heriansyah Heriansyah
International Journal of Advances in Applied Sciences Vol 15, No 2: June 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v15.i2.pp872-882

Abstract

Economic growth and food security are closely interconnected dimensions of sustainable regional development, particularly in agrarian regions such as Lampung Province, Indonesia. However, conventional analytical approaches often fail to capture the complex and nonlinear relationships between agricultural productivity and socio-economic conditions. This study aims to analyze the determinants of regional economic growth by integrating agricultural and socio-economic indicators using a random forest–based modeling framework. Secondary panel data from 15 districts over the period 2014–2024 were analyzed, comprising 165 observations and 14 explanatory variables. The results show that agricultural production plays a dominant role, with rice production and harvested area contributing approximately 39.8% and 34.7% of total feature importance, respectively. The model achieved strong predictive performance with a coefficient of determination (R2) of 0.68 and root mean squared error (RMSE) of 6,346.82, indicating that the selected variables explain a substantial portion of gross regional domestic product (GRDP) variation. Socio-economic factors, including poverty rate, per capita expenditure, and human development index (HDI), also contribute meaningfully to regional economic outcomes. These findings highlight the importance of integrating agricultural productivity with social development policies to achieve inclusive and sustainable economic growth. The proposed approach provides a data-driven framework to support regional policy formulation and improve food security strategies.
Co-Authors Adang Suwandi Ahmad Agiska Ria Supriyatna Ambarwari, Agus Arwin Datumaya Wahyudi Sumari Eko Subyantoro Eko Subyantoro Feri Utomo Fitriani Fitriani Fitriani Haikal, Antoni Halim Fathoni Heriansyah Heriansyah Imam Asrowardi Imam Sofi'i Kemas, Kemas Ocha Khairi Saputra Lailita Permata Mario Yudhiprawira Moh. Haris Imron S Jaya Nadia Nabiha Dziqra Nelmiawati, Nelmiawati Noer, Irmayani Norzaidi Haji Mohd Daud Nurul Qomariyah Sarwono Sutikno Subyantoro, Eko Subyantoro, Eko Subyantoro, Eko Subyantoro, Eko Supriyatna, Agiska Ria Utomo, Feri Widyawati, Dewi Kania Yusuf Kurniawan Zuriati, Zuriati