Abstract
Data security is an important thing that must be done in the cyber era. The use of various kinds of digital technology in helping various human activities needs to be balanced with adequate data security. One of the ways that can be used in securing data is through cryptography. Atbash cipher is one of the cryptographic techniques used in securing data. However, this algorithm has a weakness because it only uses the process of reversing the position of the characters to be secured. This study proposes a cryptographic model that can maximize data security from the atbash cipher. The proposed model is a combination of the atbash cipher with the autokey cipher. The tests carried out on the proposed model have a 100% success rate, meaning that the encrypted message resulting from the proposed encryption process has been successfully restored to its original form through the proposed decryption process. The results of this study indicate that the atbash cipher cryptographic algorithm, combined with the autokey cipher algorithm can produce an encrypted message that is more difficult to crack.
Highlights
Data memiliki peranan yang sangat penting bagi kelangsungan sebuah institusi maupun perusahaan di era Cyber Security maupun Revolusi Industri 4.0
This study proposes a cryptographic model that can maximize data security from the atbash cipher
The results of this study indicate that the atbash cipher cryptographic algorithm, combined with the autokey cipher algorithm can produce an encrypted message that is more difficult to crack
Summary
Data memiliki peranan yang sangat penting bagi kelangsungan sebuah institusi maupun perusahaan di era Cyber Security maupun Revolusi Industri 4.0. Kelemahan utama algoritma kriptografi yang menerapkan teknik substitusi adalah tingkat keamanan yang cenderung belum maksimal, termasuk Atbash Cipher. Permasalahan utama yang akan diteliti dalam penelitian ini adalah terkait dengan kelemahan tingkat keamanan data pada algoritma kriptografi Atbash Cipher. Kelemahan Atbash Cipher lainnya adalah termasuk salah satu algoritma kriptografi yang klasik dan hanya memanfaatan proses membalikkan posisi karakter yang akan diamankan, hal ini cenderung dapat dengan mudah diretas dan keamanan data menjadi kurang maksimal [11], [12]. Beberapa penelitian relevan telah dilakukan sebelumnya, salah satunya adalah penelitian yang bertujuan untuk melakukan pengamanan data melalui kombinasi dua metode antara atbash dan viginere cipher [9]. Penelitian ini bertujuan untuk melakukan pengembangan model kriptografi substitusi Atbash Cipher, sehingga dihasilkan tingkat keamanan data yang lebih baik. Media yang akan digunakan sebagai uji coba terhadap konsep yang diusulkan adalah berupa teks yang terdiri dari sekumpulan karakter huruf maupun angka
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