Komputiva: Jurnal Ilmu Komputer dan Inovasi Teknologi

PENGAMANAN CITRA DIGITAL MENGGUNAKAN ALGORITMA KRIPTOGRAFI RC4

2025-12-17T22:54:12+00:00

The increased use of digital images in communication and social media raises the risk of interception, manipulation, and unauthorized access. This study evaluates the security of JPEG and PNG formatted images using an enhanced RC4 cryptographic algorithm through longer key lengths, key randomness, and the use of salt. The objectives include the implementation of RC4 on images, the assessment of the security level of the encryption results, and testing resilience against brute force and dictionary attacks. It is hoped that strengthening RC4 will enhance security without sacrificing the efficiency of the encryption process for visual media.

IMPLEMENTASI SISTEM KEAMANAN APLIKASI E-VOTING DALAM PEMILIHAN KETUA BEM FAKULTAS TEKNIK UNUSU DENGAN METODE MD5

2025-12-20T23:27:43+00:00

E-voting is the use of hardware and software to build an electronic system that functions in the election process, where voters' votes are digitally recorded instead of paper ballots. E-voting technology was first introduced by several e-Government agencies, particularly in Europe, as an effort to meet the need for an effective voting system and provide a control mechanism that allows voters to cast their ballots anytime and anywhere.
To prevent various forms of data breaches and damage that are crucial to the election process, the implementation of a data security system using cryptographic techniques is necessary. Currently, various methods and algorithms can be used to protect data from various types of attacks, each with its own advantages and disadvantages.
One commonly used algorithm is MD5 (Message Digest 5), a message summarization algorithm developed by Ron Rivest. MD5 is an extension of a series of previous message summarization algorithms, also created by Rivest, and is the next generation of the original MD (Message Digest) algorithm.

RANCANG BANGUN SISTEM PEMESANAN MAKANAN ONLINE BERBASIS WEB DENGAN FITUR QR MENU

2025-12-18T13:48:30+00:00

The advancement of information technology has driven significant changes in the service systems within the culinary sector. Restaurants and cafes now require an efficient system to minimize order recording errors and speed up service. This research aims to design a web-based online food ordering system with a QR menu feature that facilitates customers in placing orders without the need for direct interaction with the waiter. The research method used is the Waterfall model, focusing on the stages of requirements analysis and system design. The results of the research include a system design that encompasses context diagrams, DFDs, ERDs, and user interface designs. This design is expected to serve as a reference for the development of similar systems to enhance operational efficiency and customer satisfaction.

PERBANDINGAN PERFORMA ANTARA ALGORITMA COSINE TRANSFORM (DCT-2D), ALGORITMA DISCRETE WAVELET TRANSFORM (DWT), DAN ALGORITMA LEAST SIGNIFICANT BIT INSERTION (LSB) DALAM STEGANOGRAFI BERBASIS VIDEO

2025-12-16T21:30:38+00:00

Di era Industri 4.0, perkembangan multimedia dan internet telah memfasilitasi distribusi dan transmisi informasi. Namun, keamanan dan kerahasiaan informasi sering menimbulkan tantangan yang signifikan. Salah satu cara untuk mengatasi hal ini adalah melalui teknik steganografi, yang memungkinkan penyembunyian informasi rahasia dalam media digital tanpa menarik perhatian pihak ketiga. Algoritma Discrete Cosine Transform (DCT) dan Discrete Wavelet Transform (DWT) adalah dua teknik yang umum digunakan dalam steganografi untuk menanamkan data ke dalam media digital seperti gambar dan video. Dalam studi ini, kami mengusulkan perbandingan antara algoritma DCT-2D, DWT, dan metode penyisipan Least Significant Bit (LSB) dalam steganografi video. Melalui analisis kinerja ketiga algoritma ini, penelitian ini bertujuan untuk memberikan pemahaman yang lebih baik tentang efektivitas dan keuntungan relatif dari setiap pendekatan dalam menyembunyikan informasi rahasia dalam video.

PERANCANGAN PORTAL KECAMATAN MEDAN HELVETIA BERBASIS WEBSITE DENGAN DJANGO

2025-12-19T21:15:39+00:00

Transparency of village government is an important aspect in increasing public trust in village management. This study aims to design and implement a village website as a medium for information and government transparency using the Django Framework and the Python programming language. The method used is the Software Development Life Cycle (SDLC) with a waterfall model that includes the stages of needs analysis, system design, implementation, testing, and maintenance. The system is designed with a Model-View-Template (MVT) architecture that separates business logic, display, and data. The main features developed include news and announcement management, village profiles, online administration services, transparency of the Village Revenue and Expenditure Budget (APBDes), an activity gallery, and a public complaint system. System testing using black box testing and usability testing methods showed that the system functioned well with a user satisfaction rate of 87.5% and a functional success rate of 95%. The implementation of this village website has proven effective in increasing the accessibility of village information and realizing good governance at the village level.