Kriptografi Teks Berbasis Algoritma Substitusi Vigenere Cipher 8 Bit

Nida Aulia Karima; Ade Nurul Aisyah; Hercio Venceslau Silla; Lekso Budi Handoko; Ramadhan Rakhmat Sani

doi:10.14710/jmasif.15.1.60836

DOI: https://doi.org/10.14710/jmasif.15.1.60836

Kriptografi Teks Berbasis Algoritma Substitusi Vigenere Cipher 8 Bit

Nida Aulia Karima , Ade Nurul Aisyah, Hercio Venceslau Silla, Lekso Budi Handoko

, Ramadhan Rakhmat Sani

University of Dian Nuswantoro, Indonesia

Received: 20 Dec 2023; Revised: 9 May 2024; Accepted: 10 May 2024; Available online: 31 May 2024; Published: 31 May 2024.

Editor(s): Prajanto Adi

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract

Vigenere Cipher merupakan salah satu algoritma kriptografi klasik dalam dunia kriptografi. Penelitian ini berfokus pada penggunaan metode Vigenere Cipher dan implementasinya dalam mengamankan sebuah teks pesan berbentuk ASCII. Penelitian ini menggunakan empat metode pengujian yaitu, Avalanche Effect, Character Error Rate (CER), Bit Error Rate (BER), dan Entropi. Hasil pengujian mendapatkan bahwa nilai Avalanche Effect yang dihasilkan rata-rata berada pada angka 50% ke atas, artinya diperoleh nilai Avalanche Effect yang baik. Selain itu, CER dan BER yang dihasilkan bernilai 0, artinya tidak terjadi kesalahan selama proses enkripsi. Nilai Entropi yang dihasilkan juga meningkat seiring dengan panjang plaintext yang digunakan dan juga dipengaruhi penggunaan ASCII 256 berupa huruf, angka, dan simbol.

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Keywords: Kriptografi; Vigenere Cipher; ASCII; Avalanche Effect; Entropi;

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Section: Research Article

Language : ID

In Vol 15, No 1 (2024): Jurnal Masyarakat Informatika

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