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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Fitopatologi Indonesia Buletin Hama dan Penyakit Tumbuhan Jurnal Agrista JIK Jurnal Ilmu Komputer Microbiology Indonesia BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Ilmu Komputer dan Agri-Informatika Teodolita: Media Komunikasi Ilmiah di Bidang teknik Seminar Nasional Informatika (SEMNASIF) Jurnal Perlindungan Tanaman Indonesia Sinkron : Jurnal dan Penelitian Teknik Informatika Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Jurnal Ilmiah Universitas Batanghari Jambi Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control JITK (Jurnal Ilmu Pengetahuan dan Komputer) IKRA-ITH Informatika : Jurnal Komputer dan Informatika Jurnal Informatika Universitas Pamulang Eduscience : Jurnal Ilmu Pendidikan Jurnal Pengabdian Masyarakat AbdiMas Jiko (Jurnal Informatika dan komputer) Astonjadro IKRA-ITH ABDIMAS AL-TANZIM : JURNAL MANAJEMEN PENDIDIKAN ISLAM JUTEKIN (Jurnal Manajemen Informatika) Simtek : Jurnal Sistem Informasi dan Teknik Komputer Aptisi Transactions on Technopreneurship (ATT) CCIT (Creative Communication and Innovative Technology) Journal Jurnal Teknologi Komputer dan Sistem Informasi Jurnal Fokus Elektroda : Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Generation Journal Jurnal Tekinkom (Teknik Informasi dan Komputer) Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences International Journal Of Science, Technology & Management (IJSTM) Fokus Elektroda: Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) IAIC Transactions on Sustainable Digital Innovation (ITSDI) Jurnal Teknologi dan Sistem Tertanam Jurnal Sosial dan Teknologi Devotion: Journal of Research and Community Service Jurnal Minfo Polgan (JMP) Jurnal Sistem Informasi, Teknik Informatika dan Teknologi Pendidikan (JUSTIKPEN) Journal of Social Research Ilmu Komputer untuk Masyarakat Jurnal Locus Penelitian dan Pengabdian IKA BINA EN PABOLO : PENGABDIAN KEPADA MASYARAKAT Prosiding Seminar Nasional Sisfotek (Sistem Informasi dan Teknologi Informasi) Jurnal Indonesia Sosial Teknologi Jurnal Indonesia Sosial Sains Eduvest - Journal of Universal Studies Innovative: Journal Of Social Science Research Media Abdimas Jurnal penelitian jalan dan Jembatan Journal of Innovative and Creativity Asian Journal of Social and Humanities Jurnal Ilmu Ekonomi, Pendidikan dan Teknik (IDENTIK) Jurnal Pengabdian kepada MASyarakat (J-PMAS) Innovative Research in Civil and Environmental Engineering (IRCEE) Global Insights in Management and Economic Research
Budi Tjahjono
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IMPLEMENTATION BLOCKCHAIN IN MOBILE APPLICATIONS SEMINAR ON E-CERTIFICATE VERIFICATION USING SMART CONTRACTS Sahri Ramadan; Sawali Wahyu; Budi Tjahjono; Riya Widayanti
JIKO (Jurnal Informatika dan Komputer) Vol 9 No 1 (2026)
Publisher : Program Studi Teknik Informatika Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jiko.v9i1.11356

Abstract

The increasing adoption of electronic certificates in academic and professional environments raises critical challenges related to authenticity, data integrity, and verification reliability. Conventional certificate management systems commonly rely on centralized architectures and manual validation procedures, which are vulnerable to manipulation, duplication, and single points of failure (SPoF). This study proposes a blockchain-based electronic certificate verification system implemented on a private Hyperledger Fabric network using smart contracts. The system records certificate verification metadata on a distributed ledger to ensure integrity and traceability while maintaining storage efficiency. Smart contracts automate the issuance and validation lifecycle, enabling transparent and tamper-resistant certificate management. The verification process is conducted by comparing document authentication data with records stored on the blockchain. Experimental evaluation demonstrates that the proposed system can accurately identify document alterations and consistently distinguish between valid and invalid certificates. The results indicate that the integration of blockchain and smart contracts as an active validation mechanism enhances transparency, reduces dependence on centralized authorities, and improves trust in mobile-based digital credential systems. Therefore, the proposed approach provides a secure and reliable framework for electronic certificate verification in academic environments.
WEB-BASED FACIAL SKIN TYPE CLASSIFICATION SYSTEM BASED ON BAUMANN'S THEORY Budi Tjahjono; Dian Fajar Septianto; Gerry Firmansyah; Yulhendri; Suhatati Tjandra
JITK (Jurnal Ilmu Pengetahuan dan Teknologi Komputer) Vol. 11 No. 3 (2026): JITK Issue February 2026
Publisher : LPPM Nusa Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33480/jitk.v11i3.5724

Abstract

The skin is a crucial organ in the human body, serving not only as the primary protective barrier but also exhibiting diverse characteristics such as specific types and conditions. Increasingly, people are recognizing the importance of skin care in their daily routines. However, a lack of understanding about different skin types and appropriate skin care products can pose challenges. This research aims to develop a facial skin type classification system based on the existing system. The development of this facial skin type classification system refers to Baumann's Theory, which categorizes skin into four characteristics: Hydration, Sensitivity, Pigmentation, and Aging. The system was developed using the Waterfall methodology and tested using Black Box Testing. The results of Black Box Testing demonstrate that the system functions well and meets the specified requirements. All features and functionalities operate optimally without significant bugs, indicating the success of the Waterfall approach in producing a reliable and ready-to-use system. This system is expected to assist users in accurately identifying their skin type and receiving appropriate skincare solutions, thereby improving the health and appearance of their facial skin.
Digital Marketing Innovation for MSMEs through ChatGPT Integration and Management Information Systems: A Technological Transformation Approach for Competitive Advantage Susilowati Ningsih; Budi Tjahjono
Jurnal Minfo Polgan Vol. 13 No. 1 (2024): Artikel Penelitian
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/jmp.v13i1.13924

Abstract

Micro, Small, and Medium Enterprises (MSMEs) play a significant role in Indonesia's economy. However, with technological advancements and changing consumer trends, MSMEs face substantial challenges in maintaining and enhancing their competitiveness. The development of digital technology is an imperative that cannot be ignored if MSMEs are to remain relevant and competitive in the modern era. This research examines how the integration of ChatGPT and Management Information Systems (MIS) can positively impact the digital marketing of MSMEs and how these enterprises can leverage this technology to enhance their competitiveness. This study employs a literature review method with a qualitative approach. Data were obtained from Google Scholar covering the period from 2014 to 2024. The results indicate that digitalization, through the implementation of technologies such as ChatGPT and Management Information Systems, significantly impacts MSMEs by enhancing their competitiveness. Integrating ChatGPT with MIS not only improves operational efficiency but also enriches customer experience through more responsive and personalized services. Case studies from companies like Tokopedia, Zalora, and Kopi Kenangan demonstrate that adopting digital technology can expand market reach, increase sales, and improve stock management. However, challenges such as infrastructure limitations and the need for staff training must be addressed to ensure successful technology adoption. The long-term success of digital technology highlights the importance of sustainable investment and adaptation to evolving market trends.
Pengembangan E-Learning Berbasis PWA pada TPA Masjid Arraudhah dengan Pendekatan Koneksi Terbatas Rafi Samir Suradijaya; Yulhendri Yulhendri; Budi Tjahjono; Popong Setiawati
Jurnal Minfo Polgan Vol. 15 No. 1 (2026): Artikel Penelitian
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/jmp.v15i1.16169

Abstract

Masalah utama dalam pembelajaran daring di Taman Pendidikan Al-Qur'an (TPA) Masjid Arraudhah adalah infrastruktur internet, dengan hasil pengujian rata-rata hanya 1,2 Mbps. Kondisi jaringan yang tidak stabil dan tidak dapat diandalkan ini memengaruhi penyebaran materi digital serta mengurangi efektivitas pembelajaran mandiri. Tujuan dari penelitian ini adalah untuk mengembangkan sistem e-learning berbasis Progressive Web Apps (PWA) yang dioptimalkan untuk kondisi internet saat ini melalui pengembangan offline-first. Metode pengembangan yang digunakan adalah prototyping, yang meliputi analisis kebutuhan, pembuatan prototipe, implementasi, evaluasi, dan perbaikan sistem berdasarkan umpan balik pengguna. Sistem yang sedang dikembangkan memiliki fitur untuk mengelola materi pendidikan seperti video dan PDF, pengelolaan tugas, serta ujian akhir (UAS) dengan penilaian otomatis berdasarkan aturan. Teknologi PWA diimplementasikan melalui mekanisme caching menggunakan Service Worker dan Web App Manifest untuk meningkatkan akses luring (offline) ke konten yang sebelumnya diakses. Hasil penggunaan Google Lighthouse menunjukkan kualitas aplikasi yang sangat baik dengan skor 90 untuk aksesibilitas, 100 untuk praktik terbaik, dan 100 untuk SEO. Selain itu, sistem ini mampu memastikan kelancaran akses materi saat koneksi terputus dan secara otomatis menyinkronkan data jawaban ujian ketika koneksi kembali tersedia. Dengan demikian, e-learning berbasis PWA merupakan solusi teknologi yang efektif dan fleksibel untuk mendukung transformasi digital dalam pendidikan nonformal yang dilengkapi dengan infrastruktur jaringan.
Co-Authors *, Hairuduin A.A. Ketut Agung Cahyawan W Adhi Fernandes Gamaliel Adhy, Dewanto Rosian Adigunawan, Adigunawan Adilah Widiasti Aep Saepudin Ahmad Fuad Ahmad Mutedi Aji Setiawan Akbar, Habibullah Alami, Tegar Alex Hartana Alexander Alexander, Alexander ALINA AKHDIYA RUSMANA Alivia Yufitri Amarila Malik Andi Khaeruni Andi Khaeruni Andriana, Dian Angga VB Annazma Ghazalba Antonius Suwanto Anugerah Cahyo Adhi Ardiansyah, Miri Arif Pami Setiaji Aris Tri Wahyudi Arniansyah, Arniansyah Ary Prabowo Asniwita Asniwita Aulia, Faujiatul Azzam Robbani, Muhammad Baby Anjeli Bambang Irawan Basyarewan, Humairoh Bayu Sulistiyanto Ipung Sutejo Binastya Anggara Sekti Budi Aribowo Budilaksono, Sularso Dadang Hermawan Dafa Rizqi, Herin Daniel Hutajulu Dede Setiadi Dermawan Zebua Dewi Marini Diah Aryani, Diah Dian Fajar Septianto Djunaedi, Bagas Donny Dwy Judianto Leihitu Dwi Guntoro Dyah Kusuma Anggraini Edi Kartawijaya EDWARD ENDRIANTO Eliza S. Rusli Erry Yudhya Mulyani Euis Heryati Evans, Richard Faiz Fauzan Muhajir Fatonah, Nenden Siti Fauzia, Yunita Febrianto, Haris Fernandes Gamaliel, Adhi Firdaus, M. Dzulfiqar Gerry Firmansyah Gerry Firmansyah Gerry Firmasyah Ghazalba, Annazma Gilang, Destian Gunawan, Sholeh Gusti Fachman Pramudi Hadjarati, Panji Ramadhan Yudha Putra HAJRIAL ASWIDINNOOR HARLING, ROB Haryoto, Iin Sahuri Hemiltin Adilah Hendaryatna Hendaryatna Hendry Gunawawan Hermansyah Hermansyah Hermansyah Hermanto, Hermanto Hermawan, Deky Herwanto, Agus Hidayat, Muhamad Rifqi Huda, Nur Huda Hung Fei Ichwani, Arief Irawan, Bambang Irdika Mansur Irsyadul Anam, Reza ISKANDAR ZULKARNAEN SIREGAR Islamy, Muhammad Rafli Ismiyati Meiharsiwi Jabar, Ajib Abdul Jefry Sunupurwa Asri Joniwan Joniwan Judianto Leihitu, Donny Dwy Juliana Juliana Kartini Kartini kartini, kartini Khairurrahman, Rifqi Kikin H Mutaqin Klaski Putri, Krisanti Kundang Karsono Kundang Karsono Kundang Karsono Juman Kundang Karsono Juman Kurnia, Ravie Kusuma, Mahesa Adi Kusumah, Yayi Munara Laksono Trisnantoro Leihitu, Donny Dwy Judianto Lili Hastuti Lisdar Idwan Sudirman Lisdiana Lisdiana Lisdiana Lisdiana Luthfie Aldino Ismail M A Chozin Maemonah, Maemonah Malabay Malabay Martin Saputra, Martin Marzuki Pilliang Meiharsiwi, Ismiyati Meity S. Sinaga MEITY SURADJI SINAGA Meria, Lista Millah, Shofiyul Mita, Vira Muhammad Abdullah Hadi Muhammad Abdullah Hadi Muhammad Azzam Robbani Muhammad Bagaskara Muhammad Fajrul Aslim Muhammad Hadi Arfian Muhtadi, Yudi Muksin, Andreanata Pradifta Munawar Munawar, Badri Mutedi, Ahmad N Nurjannah, N Nurjannah Nabila, Efa Ayu Nainggolan, Restamauli br Narul Sakron Nasihin, Anwar Nasution, Tegar Alami Nenden Siti Fatomah Niko Prasetyawan Aji Nila Rusiardi Jayanti Nina Nurhasanah, Nina Nindyo Artha Dewantara Wardhana Nixon Erzed Nizirwan Anwar Nugraha, William Nur Widiyasono Nur Widiyasono, Nur Pamungkas, Ryan Tri PURNAMA HIDAYAT Purwano SK Putra, Sipky Jaya Putra, Yosua Tri Qiqi Asmara, Abdullah Qornain, Fiqar Haytsam Muhammad Dzul Qur'ani, Isti R SITI RUKAYAH Rafi Samir Suradijaya Rahaman, Mosiur Rasyid, Ainur Reza Irsyadul Anam Rian Adi Pamungkas Ridwan, Ridwan Rifqi Khairurrahman Riris Septiana Sita Dewi Riya Widayanti Rizk, Muhamad Roesfiansjah Rasjidin Rohidin Rohidin, Rohidin Rosnanto, Imam RR. Ella Evrita Hestiandari Rudi Hermawan Rudi Hermawan Rudy Setiawan RUSMILAH SUSENO Rusnani * Ryan Putra Laksana Sabaruddin, Satria Sabri Alim Saepudin Saepudin Sahri Ramadan Sakron, Narul Samingan Samingan Samuel Samuel SARASWATI, RIA Sawali Wahyu Septian, Ferby Septianto, Dian Fajar Setiawan, Sony Setiawati, Popong Shine Pintor Siolemba Patiro Sholeh Gunawan Siregar, Sarah Veronica Siti Fatomah, Nenden Sri H. Hidayat SRI HENDRASTUTI HIDAYAT Sri Husni Hidayati Suardana, Made Aka Sugeng Santoso Suhatati Tjandra Suhendar Suhendar, Suhendar Sulistyo, Catur Agus Supriyade Supriyade Supriyade, Supriyade Suryahim, Iim Susilowati Ningsih Sutanto, Imam Tarigan, Masmur Tengku Riza Zarzani N Teras, Deni Trenggana Natadirja Tugiman Ulum, Muhamad Bahrul Ummanah Ummanah, Ummanah Visal Mohammad Rizki Vivaldi Raditya Putra Wahyu Sabiqudin, Muhammad Wardhana, Nindyo Artha Dewantara Wibowo, Yudha Widiasti, Adilah Widodo, Agung Mulyo Wijaya, Jacob S William Nugraha Wisnu Ananta Kusuma Yessy Oktafriani Yudha Putra Hadjarati, Panji Ramadhan Yulhendri Yulhendri Yuliana Susanti Yuliati -