Modifikasi Algoritma Hill Chiper  dan Twofish Menggunakan Kode Wilayah Telepon

Yunita, Selviana; Hasan, Patmawati; Ariyus, Dony

doi:10.30700/jst.v9i2.489

Cited by 2 publications

(2 citation statements)

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“…Data atau sistem yang tidak aman tentu akan berdampak buruk (Riadi et al, 2020). Salah satu metode yang dapat digunakan untuk mempertahankan kerahasiaan suatu data adalah dengan mengubahnya menjadi data tersandi yang tidak bermakna, proses ini bisa biasa disebut sebagai kriptografi (Yunita et al, 2019). Menurut terminologinya, kriptografi merupakan ilmu dan seni yang digunakan untuk mengamankan pesan ketika pesan dikirim dari suatu sumber ke tempat tujuan.…”

Section: Metode Penelitianunclassified

Pengamanan Citra Digital Berbasis Kriptografi Menggunakan Algoritma Vigenere Cipher

Riadi

Fadlil

Tsani

2022

JISKa

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Cryptography is one of the most popular methods in data security by making data very difficult to read or even unreadable. One of the well-known techniques or algorithms in cryptography is Vigenere Cipher. This classic algorithm is classified as a polyalphabetic substitution cipher-based algorithm. Therefore, this algorithm tends to only handle data in text form. By this research, a console-based application has been developed which is made from PHP programming language to be able to encrypt and decrypt digital image media using Vigenere Cipher. The encryption process is done by first converting a digital image into a base64 encoding format so that the encryption process can be carried out using the tabula recta containing the radix-64 letter arrangement used for base64 encoding. Conversely, the decryption process is carried out by restoring the encrypted file using radix-64 letters, so we get the image file in the base64 encoding format. Then, the image with the base64 encoding format is decoded into the original file. The encryption process took less than 0,2 seconds and 0.19 seconds for the decryption process and 33.34% for average file size addition on the encrypted file from the original file size. Testing on ten different images with different sizes and dimensions showed a 100% success rate which means this research was successfully carried out.

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Section: Metode Penelitianunclassified

Pengamanan Citra Digital Berbasis Kriptografi Menggunakan Algoritma Vigenere Cipher

Riadi

Fadlil

Tsani

2022

JISKa

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“…Many cryptographic algorithms, including the Hill Cipher, can be applied to the encryption process. Hill cipher is a symmetrical algorithm classified as a classic algorithm, and hill cipher is a substitution cipher with matrix multiplication [4]. The working process principle of Hill Cipher is to compare plaintext and ciphertext in both negative and positive directions [5].…”

Section: Introductionmentioning

confidence: 99%

Keyword Security Implementation Based on Hill Cipher Optimized Using Genetic Algorithms

Yudantiar,

Purwanto,

Winarno

2023

Int. J. Artif. Intell. Robot.

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In the process of exchanging data and information, the most important task is to maintain data and information security and reach out to interested parties. One way this can be achieved is through encryption, a process better known as cryptography. Cryptography can scramble messages so that, even if intercepted, the message cannot be immediately read. One example of an encryption algorithm is the Hill Cipher. The Hill Cipher uses an m-by-m-sized matrix as the key for the encryption and decryption process, making it a challenging algorithm to crack. The key provided for the Hill Cipher encryption and decryption process cannot be arbitrary. The keys with mismatched determinants cannot be used, as they can prevent the encrypted message from being restored to its original form. Optimization can be carried out to overcome these obstacles using a genetic algorithm. Genetic algorithms can determine the keys to encrypt and decrypt the Hill Cipher. A key with the appropriate composition for the Hill Cipher will be obtained through the genetic algorithm's evaluation function. This research aims to enhance message security by using the correct composition to generate Hill Cipher encryption and decryption keys. The research results indicate that out of 10 tests conducted with different lengths of original text, eight succeeded, while two failed to complete the encryption and decryption process.

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Modifikasi Algoritma Hill Chiper dan Twofish Menggunakan Kode Wilayah Telepon

Cited by 2 publications

References 0 publications

Pengamanan Citra Digital Berbasis Kriptografi Menggunakan Algoritma Vigenere Cipher

Pengamanan Citra Digital Berbasis Kriptografi Menggunakan Algoritma Vigenere Cipher

Keyword Security Implementation Based on Hill Cipher Optimized Using Genetic Algorithms

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