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All Journal Jurnal Simantec JOURNAL OF INFORMATICS AND COMPUTER SCIENCE
Afrizal, Rizki
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Computer Science & IT

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Implementation of Least Significant Bit Steganography with Caesar Cipher Layout Dvorak web-based Kurnia, Ridhwan Nadif; Pradiptha, Al Diras; Permana, Muhammad Fajar Jati; Dipradja, Kimberly Alfa; Afrizal, Rizki; Pradeka, Deden; Khaerunnisa, Zahra
Jurnal Simantec Vol 14, No 1 (2025): Jurnal Simantec Desember 2025 (Article in Progress)
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
APLIKASI MONITORING PERSEDIAAN BARANG DAN ALAT TULIS KANTOR 9ATK) PADA RUMAH SAKIT Afrizal, Rizki; Utama, Rizki Julia; Wibawa, M Bayu
JOURNAL OF INFORMATICS AND COMPUTER SCIENCE Vol 11, No 1 (2025): APRIL 2025
Publisher : Ubudiyah Indonesia University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33143/jics.v11i1.5196

Abstract

AbstrakManajemen persediaan barang dan ATK di rumah sakit sangat penting untuk menjaga kelancaran operasional layanan kesehatan. Sistem manual yang masih digunakan di banyak rumah sakit sering kali menyebabkan keterlambatan dalam pengadaan barang, kekurangan stok, dan kesalahan pencatatan. Penelitian ini bertujuan untuk merancang dan mengembangkan Aplikasi Monitoring Persediaan Barang dan ATK pada Rumah Sakit yang dapat memantau stok barang secara real-time, mencatat penggunaan barang, serta memberikan peringatan otomatis saat stok mencapai batas minimum. Sistem ini menggunakan basis data terpusat untuk memastikan akurasi data serta memiliki fitur pelaporan yang memudahkan manajemen dalam mengambil keputusan terkait pengadaan barang. Dengan adanya aplikasi ini, diharapkan rumah sakit dapat meningkatkan efisiensi dalam pengelolaan persediaan, mengurangi risiko kekurangan barang penting, serta meningkatkan akuntabilitas dalam penggunaan barang dan ATK. 
Co-Authors Deden Pradeka Dipradja, Kimberly Alfa Khaerunnisa, Zahra Kurnia, Ridhwan Nadif Permana, Muhammad Fajar Jati Pradiptha, Al Diras Utama, Rizki Julia Wibawa, M Bayu