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All Journal Jurnal Teknik Indonesia (JU-TI) Jurnal Inovasi Teknologi dan Komputer
Yoramo Waruwu
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Other

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Merkle-Damgård as the Foundation of Hash Cryptography: A Study of Advantages and Limitations Tri Ade Nia; Rudyanto Ompungsunggu; Arrant Ardi Sianipar; Jesimanta, Jesimanta; Yoramo Waruwu
Jurnal Teknik Indonesia Vol. 3 No. 01 (2024): Jurnal Teknik Indonesia (JU-TI), June 2024
Publisher : SEAN Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/ju-ti.v3i01.652

Abstract

The Merkle-Damgård algorithm is a key foundation in many cryptographic hash functions, including MD5, SHA-1, and SHA-256. This article discusses the working mechanism of the Merkle-Damgård structure, its advantages in maintaining data integrity, as well as the weaknesses that make it vulnerable to certain attacks. The study uses a quantitative approach through simulation and testing of Merkle-Damgård-based hash functions. This structure allows a variable-length input to be converted into a fixed-length hash output through a block-based iterative process and compression function. The results show that this algorithm successfully converts plaintext into a unique hash according to the hashing principle, as shown in both binary and ASCII representations. While effective in many digital security applications, this research highlights the importance of mitigating against potential attacks to improve the security of Merkle-Damgård-based algorithms.
Implementasi Debian 10 Sebagai Backbone Layanan Jaringan Terintegrasi di Fakultas Ilmu Komputer Septrian Napitupulu; Devi Silvia Simbolon; Dewi Ruth Nababan; Yoramo Waruwu
JITKO : Jurnal Inovasi Teknologi dan Komputer Vol. 3 No. 1 (2025): Jurnal Inovasi Teknologi dan Komputer(JITKO)
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jitko.v3i1.117

Abstract

Penelitian ini bertujuan untuk mengimplementasikan Debian 10 sebagai backbone layanan jaringan terintegrasi di lingkungan Fakultas Ilmu Komputer. Permasalahan utama yang diangkat adalah ketidakefisienan pengelolaan server yang masih menggunakan banyak perangkat fisik terpisah. Penelitian ini mengusulkan solusi berbasis virtualisasi dengan mengintegrasikan berbagai layanan dalam satu server terpusat. Metode penelitian dilakukan dengan merancang dan mengimplementasikan beberapa layanan jaringan meliputi DNS, FTP, web server (WordPress), email server (Postfix dan Dovecot dengan Roundcube), monitoring (Nagios), serta sistem backup (Bacula) pada satu server Debian 10 menggunakan VMware Workstation. Evaluasi kinerja dilakukan melalui pengujian konektivitas dan fungsionalitas layanan, termasuk resolusi DNS, transfer file, akses web, pengiriman email, monitoring sistem, serta proses backup. Hasil penelitian menunjukkan bahwa seluruh layanan berjalan dengan baik dan stabil, dengan waktu respon rata-rata kurang dari 1 detik, packet loss 0% pada layanan FTP, serta uptime layanan mencapai 100% selama pengujian. Hasil ini menunjukkan bahwa implementasi Debian 10 berbasis virtualisasi mampu meningkatkan efisiensi penggunaan perangkat keras, menyederhanakan manajemen sistem, serta tetap menjaga kinerja jaringan yang handal.
Co-Authors Arrant Ardi Sianipar Devi Silvia Simbolon Dewi Ruth Nababan Jesimanta, Jesimanta Rudyanto Ompungsunggu Septrian Napitupulu Tri Ade Nia