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Muhammad Akbar Syahbana Pane
Institut Teknologi Sawit Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Public Health Social Sciences Other

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Enhancing the Hill Cipher with a Three-Pass Protocol Approach Siahaan, Andysah Putera Utama; Binti Saari, Erni Marlina; Hassan, Moustafa Hussein Ali; A. Khalid, Noor Aldeen; Pane, Muhammad Akbar Syahbana
Proceedings of The International Conference on Computer Science, Engineering, Social Science, and Multi-Disciplinary Studies Vol. 1 (2025)
Publisher : CV Raskha Media Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64803/cessmuds.v1.5

Abstract

This paper presents the design and implementation of a cryptographic scheme that combines the Hill Cipher algorithm with the Three-Pass Protocol (TPP) using mod-256 arithmetic. The objective is to provide a secure communication mechanism without direct key exchange while adapting a classical cipher to modern digital contexts. The system employs a 2×2 key matrix where plaintext characters are mapped to their ASCII values, grouped into vectors, and transformed through matrix multiplication followed by modulo reduction. The TPP structure allows both sender and receiver to apply their private keys independently, producing layered ciphertexts before the final recovery of the plaintext. A prototype application was developed using Microsoft Visual Studio 2010 (Visual Basic) to validate the approach. The program includes input fields for plaintext, ciphertext at each stage, key matrices, and a log box that records the detailed matrix operations for transparency. Experimental results demonstrate that the original plaintext can be accurately restored after multiple encryption and decryption phases, while the intermediate ciphertexts remain random and unintelligible. The findings confirm that integrating Hill Cipher with the Three-Pass Protocol strengthens confidentiality and eliminates the need for key distribution. Beyond its security benefits, the prototype also serves as an educational tool, helping students and practitioners understand both matrix-based encryption and keyless secure communication protocols.
Co-Authors A. Khalid, Noor Aldeen Ali Ikhwan Alisarjuni Padang Aly, Moustafa H. Andi Prayogi Andi Prayogi Andysah Putera Utama Siahaan Ashari, Novialdi Asnita Yani Awal, Elsa Elvira Balqis Nurmauli Damanik Binti Saari, Erni Marlina Busrizal Faisal Candra Wijaya Gulo Fahmi Ashari S. Sihaloho Friska Anggraini Barus Hafizah Hafizah Harahap, Sarwedi Hassan, Moustafa Hussein Ali Kan, Phak Len Al Eh Khairul Saleh Maisarah Mulyara, Budi Navea, Roy Francis Phaklen Ehkan, Phaklen Prayogi, Andi Rahmad Dian Rahmad Dian Rahmad Dian Ratu Mutiara Siregar Ritna Wahyuni Sari, Yessi Ratna Satia Simbolon, Hasanal Fachri Sihaloho, Ulfah Oktarida Simbolon, Hasanal Fachri Satia Sri Wahyuna Saragih Warip, Mohd Nazri Wilhelm Weber, Gerhard