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INDONESIA
Informatik : Jurnal Ilmu Komputer
Published by Universitas Pembangunan Nasional Veteran Jakarta
ISSN : 02164221     EISSN : 2655139X     DOI : -
Core Subject : Science,
Computer Science & IT
Informatik menerima artikel ilmiah dengan area penelitian pada area Internet Business & Application, Networking & Cyber Security, Statistics & Computation, Elearning & Multimedia, Robotics & Intelligene.
Arjuna Subject : -
Articles 212 Documents
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Comparative Analysis of RSA-2048, ECDSA-P256, and Ed25519 Digital Signatures in Document Authentication Systems I Wayan Rangga Pinastawa; Khoironi; Tomi Tri Sujaka
Informatik : Jurnal Ilmu Komputer Vol 22 No 2 (2026): August 2026
Publisher : Fakultas Ilmu Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52958/iftk.v22i2.14719

Abstract

Digital signatures are widely used to ensure the authenticity, integrity, and non-repudiation of digital documents. This study aims to compare the performance of RSA-2048, ECDSA P-256, and Ed25519 algorithms in digital document authentication. The dataset consisted of 500 text documents with file sizes ranging from 1 KB to 10 MB. The evaluation was conducted based on key generation time, signing time, verification time, signature size, and tampering detection capability. Each signing and verification process was repeated 10 times, resulting in a total of 15,000 observations. The experimental results show that Ed25519 achieved the fastest signing time of 0.000027 seconds and the smallest signature size of 64 bytes. RSA-2048 achieved the fastest verification time of 0.000025 seconds, while ECDSA P-256 provided intermediate performance between the two algorithms. Tampering detection tests demonstrated that all algorithms successfully detected document modifications with a 100% detection rate. Statistical analysis using the Kruskal–Wallis and Mann–Whitney U tests confirmed significant performance differences among the evaluated algorithms, with a very large effect size (η² = 0.682). Based on the obtained results, Ed25519 was found to be the most efficient algorithm for digital document authentication systems requiring high performance and compact signature sizes.
User-Centered Interface Design and Usability Evaluation of SEISMORA: An Augmented Reality Application for Earthquake Mitigation Rita Mulyandari; Pramesta Praba Sumedi; Avrillaila Akbar Harahap; Khusnul Faizin; Ghifari Virgie Wibowo
Informatik : Jurnal Ilmu Komputer Vol 22 No 2 (2026): August 2026
Publisher : Fakultas Ilmu Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52958/iftk.v22i2.14820

Abstract

Indonesia's high seismic exposure requires disaster education media that are understandable and usable by the general public. This study designed and evaluated SEISMORA, a mobile Augmented Reality (AR) application for earthquake mitigation education, using a User-Centered Design (UCD) approach. The design process comprised four iterative stages: specifying the context of use, identifying user requirements, developing design solutions, and evaluating the prototype. SEISMORA integrates PDF and video materials, AR-based evacuation simulations, and evacuation-route guidance within a simplified interface tailored to users in earthquake-prone communities. An initial summative usability evaluation involved 30 Android smartphone users aged 17–50 years in Yogyakarta. Perceived usability was measured using the 10-item System Usability Scale (SUS) and complemented by brief post-test feedback. The application obtained a mean SUS score of 78.5, indicating good and acceptable perceived usability. Descriptive responses suggested that the interface was easy to use and learn, while post-test feedback identified marker scanning under inadequate lighting or camera angles as the main interaction challenge. The findings provide initial evidence that context-specific integration of UCD and AR can produce an acceptable interface for community earthquake education. Broader multi-site testing, objective task-performance measures, and pretest–posttest preparedness assessment are required before claims of real-world effectiveness or population-level generalizability can be made.

Page 22 of 22 | Total Record : 212

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