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All Journal Techno.Com: Jurnal Teknologi Informasi JOURNAL OF APPLIED INFORMATICS AND COMPUTING Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Journal Of Information And Technology Unimor (JITU) Dulang: Jurnal Pengabdian Kepada Masyarakat
Bagas Dwi Yulianto
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Humanities Computer Science & IT Engineering Industrial & Manufacturing Engineering Social Sciences Other

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Verifikasi Quick Response Code dengan Vigenere Cipher dan Multi-Factor RSA Yulianto, Bagas Dwi; Hadi, Said Hirzi
Techno.Com Vol. 24 No. 1 (2025): Februari 2025
Publisher : LPPM Universitas Dian Nuswantoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62411/tc.v24i1.12192

Abstract

Data personal merupakan hal yang sensitif bagi pemiliknya. Kelalaian dari penggunaan teknologi terkini seperti QR Code yang kurang tepat dapat mengakibatkan kebocoran data atau informasi. Pada hakikatnya QR Code hanya mengubah informasi menjadi gambar dua dimensi yang pembacaannya menggunakan sistem pindai, sehingga informasi yang didalamnya belum terlindungi dan informasi tersebut dapat langsung dibaca oleh semua orang. Penelitian ini berfokus pada kombinasi kriptografi simetris Vigenere Cipher serta kriptografi asimetris RSA yang ditingkatkan lagi menjadi Multi-factor RSA. Kombinasi tersebut untuk meningkatkan keamanan suatu informasi/data sebelum dirubah menjadi QR Code. Metode yang diusulkan membuktikan bahwa QR Code yang dipindai langsung dari berbagai perangkat akan menghasilkan kode enkripsi sehingga pihak tidak bertanggungjawab tidak dapat membaca nilai pesan asli. Pesan asli hanya bisa dibaca dari dari scanner dengan metode yang diusulkan sehingga keamanan QR Code terverifikasi. Serta hasil uji dengan Avalanche effect memenuhi standar baik dengan nilai 53,671875%.   Kata kunci: QR Code, Vigenere Cipher, Multi-factor RSA
Digitalization of double entry bookkeeping and marketing of Wonogiri Cashew Farmers Group towards globalization Suwasono, Heru; Yulianto, Bagas Dwi; Anggiratih, Endang
Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Vol. 10 No. 1 (2025): February 2025
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/abdimas.v10i1.14622

Abstract

This service focuses on digitizing bookkeeping and marketing in the cashew industry. Despite existing for over 20 years and has not developed. The team aims to address this issue by providing bookkeeping training for businesses, making their transactions more visible and allowing for a better understanding of their financial results. Currently, business revenue is often mixed with personal funds, leading to the perception of small profits. The team offers marketing training to help businesses stay up to date with industry trends. These training sessions are conducted to improve the industry's overall knowledge and skills. The outcomes of the service include the creation of a web platform for industry players, a discussion group on WhatsApp, and the introduction of bookkeeping through physical books or Excel. These tools are crucial for expanding product reach and enabling better financial management, helping businesses plan for growth and make informed decisions regarding loans and other financial matters.
Enhancing the Encryption Capabilities of the Generalization of the ElGamal Algorithm for Document Security Zega, Imanuel; Yulianto, Bagas Dwi
Journal of Applied Informatics and Computing Vol. 9 No. 4 (2025): August 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jaic.v9i4.9737

Abstract

The development of cryptographic algorithms that are efficient in terms of computation and resource usage, in addition to maintaining the confidentiality, integrity, and authentication of information, is driven by the growing need for digital document security. The generalization of the ElGamal, an expansion of the traditional ElGamal algorithm with more adaptable encryption features, is one algorithm with a lot of promise in this situation. The implementation of the technique of splitting the plaintext into three-digit blocks to lower the complexity of encryption per character and the use of large prime numbers to increase the algorithm's mathematical complexity are the two main ways that this study seeks to increase the algorithm's efficiency and security. It is anticipated that this method will speed up computation time and simplify the encryption process per character without compromising security. The overall findings demonstrate that, without compromising security, this method dramatically cuts down on computation time and ciphertext enlargement. Therefore, in the age of digital transformation, the findings of this study aid in the creation of contemporary cryptographic algorithms that are more flexible and effective and serve as a strategic guide when creating a strong digital data security system.
EDUKASI PENGENALAN TEKNOLOGI INFORMASI DAN KOMPUTER PADA SISWA SDN 1 TRAYU BOYOLALI Praningki, Tutus; Yulianto, Bagas Dwi; Anggiratih, Endang
Jurnal Pengabdian Masyarakat Polmanbabel Vol. 5 No. 02 (2025): DULANG : Jurnal Pengabdian Kepada Masyarakat
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/dulang.v5i02.617

Abstract

The increasingly significant role of Information Technology (IT) is expected to have a positive impact on various aspects of life. Therefore, it is essential for young children to learn IT effectively. However, the lack of opportunities for children to develop their potential in using computer applications poses a barrier to enhancing their technological skills. As a concrete step, this community service program focuses on IT education for students at SD Negeri Trayu 1 Banyudono. The aim of this program is to improve students' knowledge and skills in learning computer software, particularly Microsoft Word and Microsoft PowerPoint, as well as to introduce them to computer hardware, thereby equipping them with the necessary tools to effectively utilize technology in the future.
The Expert System for Determining Manual Brew Coffee Techniques and Coffee Beans Using the Forward Chaining Method Fajarlestari, Maria Karmelia; Dwi Yulianto, Bagas
Journal of Information and Technology Vol. 4 No. 2 (2024): Journal of Information and Technology Unimor (JITU)
Publisher : Department of Information Technology, Universitas Timor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jitu.v4i2.7761

Abstract

An expert system for determining coffee types and brewing techniques was developed using the forward chaining method. All related data, including coffee types, brewing techniques, and coffee flavors and characteristics, were collected. From this data, rules were created for the decision-making process. The decisions made in these rules are derived from expert knowledge. The expert in this research is a barista who works as a coffee maker. The decision-making process is expressed in the form of IF(condition)-ELSE(action). The condition represents the initial facts, consisting of data used in the decision-making process, namely coffee flavors and characteristics. The action represents the conclusion, which is the result: the brewing technique to be used based on the coffee's characteristics and the recommended coffee types based on the coffee flavors. Therefore, this expert system will recommend brewing techniques and coffee types according to the desired coffee flavors and characteristics.
Co-Authors Anggiratih, Endang Hadi, Said Hirzi Heru Suwasono Imanuel Zega Maria Karmelia Fajarlestari