IMPLEMENTASI KOMBINASI ALGORITMA MYSZKOWSKI TRANSPOSITION DAN VIGENERE CIPHER PADA KEAMANAN UNTUK FILE TEKS

Abstract

Security and confidentiality issues are important aspects of data, messages and information. Myszkowski transposition work is done by compiling plaintext into matrix rows. Then the matrix is read per column so that the ciphertext is obtained. The number of columns used in the matrix is determined by the length of the key used. while the Vigenere Cipher works by reading word per character, where if the message sent exceeds the length of the key used, the key will be repeated again until the message sent gets its respective key. By combining the Myszkowski transposition algorithm and the Vigenere Cipher, it produces a method that can provide a better level of security compared to applying each method separately.
The results of the analysis and testing carried out using different decryption keys produced that the ciphertext could not be restored, which shows that this is normal because the method used is symmetric cryptography so that the decryption process can only be carried out using the same key as the key at the time of decryption.