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All Journal Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Generation Journal
Haryansyah
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Computer Science & IT Engineering

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Pengamanan Data melalui Model Super Enkripsi Autokey Cipher dan Transposisi Kolom Muhammad Fadlan; Haryansyah; Rosmini
Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Vol 5 No 6 (2021): Desember 2021
Publisher : Ikatan Ahli Informatika Indonesia (IAII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (330.286 KB) | DOI: 10.29207/resti.v5i6.3566

Abstract

One of the essential instruments in the cyber era is data. Therefore, maintaining data security is an important thing to do. One way that can be done to maintain data security is through cryptography. In cryptography, two basic techniques are commonly used, namely substitution techniques and transposition techniques. One of the weaknesses of the basic cryptographic techniques is the lower level of data security. This study proposed a super encryption model in securing data by combining cryptographic algorithms with substitution techniques, i.e., autokey cipher and transposition, i.e., columnar transposition cipher. This study used the Avalanche Effect method as a measurement tool for the proposed super encryption model. The test results have shown that the proposed super encryption model can provide a better level of security. The avalanche effect test on the five data test shows that the average AE value of the proposed super encryption model is 30.76%. This value is higher than the single autokey cipher algorithm of 1.66% and column transposition with a value of 18.03%. Other results from the five data test have shown that the proposed model has a high level of accuracy of 100% in terms of the decryption process results, which is the same as the initial data before going through the encryption process.
Implementation of the Hill Cipher Algorithm Using a 2x2 Matrix Key to Secure Text Data Roman Gusmana; Haryansyah; Adimulya Dyas Wibisono
Generation Journal Vol 7 No 3 (2023): Special Issue October 2023
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/gj.v7i3.21105

Abstract

Sebagai sebuah negara yang besar, Indonesia harus bisa memastikan bahwa semua informasi yang dihimpun dalam setiap bidang pekerjaan aman. Banyaknya kasus peretasan akhir-akhir berdampak pada hilangnya kepercayaan dan rasa aman masyarakat kepada penyedia layanan yang dalam kegiatannya turut menghimpun data yang bersifat pribadi atau rahasia. Hal ini juga kekhawatiran apabila data tersebut disalahgunakan oleh pihak-pihak yang tidak bertanggungjawab. Langkah tepat dalam melindungi informasi adalah memperkuat keamanan data dengan menerapkan teknik kriptografi, yaitu teknik dalam menyamarkan data sebagai antisipasi apabila terjadi kebocoran data, informasi yang tersimpan didalamnya akan tetap aman. Penelitian ini berfokus pada bagaimana melakukan penyandian data teks dengan menggunakan algoritma kriptografi Hill Cipher dengan menggunakan kunci matriks dengan ordo 2x2.
Co-Authors Adimulya Dyas Wibisono MUHAMMAD FADLAN Roman Gusmana Rosmini