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All Journal Jurnal Masyarakat Informatika MATEMATIKA SAINS DAN MATEMATIKA JURNAL SISTEM INFORMASI BISNIS Jurnas Nasional Teknologi dan Sistem Informasi INOVTEK Polbeng - Seri Informatika Indonesian Journal of Medicine JURTEKSI Journal of Soft Computing Exploration Journal of Renewable Energy, Electrical, and Computer Engineering Journal of Indonesian Health Policy and Administration Integra: Journal of Integrated Mathematics and Computer Science
Aris Puji Widodo
Undip
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Health Professions Mathematics Medicine & Pharmacology Public Health

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Journal : Integra: Journal of Integrated Mathematics and Computer Science

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Key Matrix Generation Using Random Functions in Hill Cipher Modulo 95 Cryptography Bahtiar, Nurdin; Widodo, Aris Puji; Puspita, Nikken Prima
Integra: Journal of Integrated Mathematics and Computer Science Vol. 2 No. 1 (2025): March
Publisher : Magister Program of Mathematics, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/integrajimcs.20252111

Abstract

In symmetric cryptography, the confidentiality of the chosen key and the security of its delivery mechanism are paramount to minimize the risk of unauthorized disclosure. Typically, in such systems, the sender and recipient focus primarily on the message (plaintext and ciphertext) rather than the complexities associated with key management. This approach aims to alleviate the burden of selecting a suitable and robust key for communicating parties. This study introduces a Hill Cipher modulo 95 cryptography method employing a matrix-based key, where key generation is achieved through a quantifiable randomization algorithm. The developed 2x2 key matrix facilitates a substantial number of possible keys, specifically 954 (exceeding 81 million). The key matrix generation process incorporates several functions, including those for ASCII character conversion, prime number verification, relative primality checks, modulo arithmetic, inverse modulo computation, determinant calculation, and inverse matrix determination. To simulate the encryption and decryption process, a desktop application was developed using the Lazarus Development IDE version 3.6. The application demonstrates effective generation of the required key matrix.
Co-Authors Adi Wibowo Adian Fatchur Rochim Alvianto, Muhammad Nur Hendra Anggraeni, Retno Setya Angin, Maria Perangin Antariksa, Muhammad Deagama Surya Arief Wahyudi Jadmiko Bayu Surarso Dwiantoro, Luky Edi Suharto Eko Adi Sarwoko Eko Sediyono Fardana, Nouvel Izza Farid Agushybana Firdaus, Zulfia Firhan, Firhan Guruh Aryotejo, Guruh Heri Sutanto Heru Winarno Immanuel, Frans Iwan Purwanto Jazi Eko Istiyanto Kusworo Adi Nabiel Putra Adam, Nabiel Putra Nikken Prima Puspita Nurdin Bahtiar Pamungkas, Ardian Pratomo, Annas Setyo R Rizal Isnanto Roziana Roziana, Roziana Samodra, Renita Fauziah Sasongko, Cornelius Damar Setyo Purnomo Sholeh, Moch. Badrus Siahaan, Josua Freddy Orlando Sodik, Ilham Akbar Sutikman, Sutikman Sutopo Patria Jati Tri Nur Kristina Untung Sujianto Vianita, Etna Vicoriza, Vicoriza Wicaksono, Januar Agung Winarsih Winarsih Woro Ningrum, Eva Liyan Yan Wisnu Prajoko Yuliani Setyaningsih Zukhruf, Afriza Meigi