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All Journal Telematika JURNAL REKAYASA TEKNOLOGI INFORMASI Compiler Digital Zone: Jurnal Teknologi Informasi dan Komunikasi CCIT (Creative Communication and Innovative Technology) Journal Jurnal Mantik Teknomatika: Jurnal Informatika dan Komputer
Dony Ariyus
Universitas AMIKOM Yogyakarta
Computer Science & IT Economics, Econometrics & Finance Education Engineering Languange, Linguistic, Communication & Media

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Journal : CCIT (Creative Communication and Innovative Technology) Journal

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Application Of Hiding Messages With Cryptographic Algorithm Modification of Caesar Cipher and Hill Cipher Rini Wijayanti; Siska Febriani; Dony Ariyus
CCIT Journal Vol 13 No 1 (2020): CCIT JOURNAL
Publisher : Universitas Raharja

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Abstract

In the current of information technology, we need a way to properly secure message. Message seurity aims to avoid intruders in communication, because the messages sent are confidential. Which can only be accessed by people who have interests. One way to secure messages is by the cryptographic method. There are many cryptograpic algorithms that can be used, such as Caesar Cipher and Hill Cipher. Both of these algorithms are symetric group cryptographic algorithms, because the keys used in the encryption and decryption process use the same key. To provide a double level security, both algorithm modifications were made. Caesar Cipher carried out the conversion process into binary numbers, and carried out XOR operations by shifting keys as an encryption process. Whereas in the Hill Cipher modification is done by using some Regional Bank codes as a key for message encryption and decryption process. The final process to get the ciphertext end result is to do permutations with a modified formula, which is adjusted to needs. The result of this study are a combination of algorithmsthat can be used to secure messages sent tp recipients. The testing process is done by comparing the size of the original image file used with the size of the resulting file size and the number of characters that can be accommodated.
Co-Authors Agung Jasuma Akrilvalerat Deainert Wierfi Bayu Trisna Pratama Christin Nandari Dengen Fajar Sudana Putra Friden Elefri Neno Hanifatus Sadiyah Hasan, Nur Fitrianingsih Raynaldi Fatih Amanullah Rini Wijayanti Sewindu Putro Siska Febriani Sumbogo Wisnu Pamungkas Vera Wati Yulius Nahak Tetik