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All Journal Jurnal Simantec Jurnal Ilmu Komputer dan Teknologi (IKOMTI)
Zahra Khaerunnisa
Universitas Pendidikan Indonesia
Computer Science & IT

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Perancangan Implementasi Aplikasi EduFund untuk Crowdfunding Pendidikan Mahasiswa dengan Keamanan Data Terintegrasi Zihan Adin Fisabilillah; Ihsan Nurdin; Nayla Salsabila; Aigha Soraya Akmal; Deden Pradeka; Zahra Khaerunnisa
Jurnal IT UHB Vol 7 No 1 (2026): Jurnal Ilmu Komputer dan Teknologi
Publisher : Universitas Harapan Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35960/ikomti.v7i1.2310

Abstract

This study proposes a mobile-based educational crowdfunding application to support students facing financial difficulties, in line with Sustainable Development Goal (SDG) 4. The primary challenge in digital donation platforms is vulnerability to transaction manipulation and falsification of verification documents. The “EduFund” application was developed using the Flutter framework with a client-server architecture, utilizing Firebase (Auth and Firestore) and Cloudinary on the backend. This study proposes the integration of a layered security approach (Defense in Depth) encompassing three protection layers: (1) token-based authentication with Role-Based Access Control (RBAC), (2) financial transaction integrity using a digital signature (SHA-256) generated using the user’s private key, and (3) document authenticity verification using steganography with the EOF Injection method. Functional and security testing results demonstrate that the digital signature mechanism successfully validates data integrity during fund withdrawals and detects data-tampering attempts, with an average signature generation time of 1.04 ms. Meanwhile, the steganography technique successfully embeds user metadata into proof documents within an execution time range of 6.80–30.10 ms without introducing observable visual distortion, enabling digital forensic verification of donation document authenticity.
Implementation of Least Significant Bit Steganography with Caesar Cipher Layout Dvorak web-based Ridhwan Nadif Kurnia; Al Diras Pradiptha; Muhammad Fajar Jati Permana; Kimberly Alfa Dipradja; Rizki Afrizal; Deden Pradeka; Zahra Khaerunnisa
Jurnal Simantec Vol 14, No 1 (2025): Jurnal Simantec Desember 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/simantec.v14i1.28794

Abstract

Secure data communication is an essential requirement in the digital age, especially in the exchange of confidential information. One of the main problems is the potential for eavesdropping by unauthorised parties who can access open messages. To overcome this, this research aims to develop a website-based system that combines the Least Significant Bit (LSB) method steganography technique and the Caesar cipher method cryptography with the Dvorak keyboard layout to increase data security. The research method used is prototype method with the stages of concept formulation, prototype design, and continuous evaluation. The system was tested by inserting the word ‘TEKKOM’ into a digital image and measuring the quality using Mean Squared Error (MSE) and Peak Signal-to-Noise Ratio (PSNR). The test results show an MSE value of 0.0001466049 and PSNR of 86.47 dB, which means that the visual quality of the image does not decrease significantly and the message is successfully inserted and extracted without errors. The Dvorak keyboard layout adds a layer of security through uncommon input patterns, making it difficult for outsiders to analyse. Thus, the system is able to provide a secure, efficient, and practical solution for web-based information hiding without the need for a database and is still user-friendly.Keywords: Dvorak, Steganography, Caesar Cipher, Least Significant Bit, Website
Co-Authors Aigha Soraya Akmal Al Diras Pradiptha Deden Pradeka Ihsan Nurdin Kimberly Alfa Dipradja Muhammad Fajar Jati Permana Nayla Salsabila Ridhwan Nadif Kurnia Rizki Afrizal Zihan Adin Fisabilillah