Modifikasi Teknik Kriptografi Hill Cipher Menggunakan Fungsi Rasional dan Konversi Basis Bilangan pada Proses Enkripsi--Dekripsi

Abstract

Hill Cipher is a classic cryptographic techniques, which use A matrix as a key for encryption and decryption process. This technique can only encrypt the plaintext and produces ciphertext alphabet character in the character of the alphabet as well. On the other hand, the Hill cipher cryptanalysis has been solved by using a technique known--‐plaintext attack matrix multiplication and linear equations. This study modifies Hill Cipher using 127 characters in the plaintext and also uses a rational function and base conversion number as a key addition to the matrix. These modifications produce a ciphertext binary bits in the element so that it can withstand attacks that break the Hill cipher cryptanalysis.