Hybrid cryptosystem using elgamal algorithm and beaufort cipher algorithm for data security

HANDRIZAL; FAUZAN NURAHMADI; SILVIA DEWI SIREGAR

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Hybrid cryptosystem using elgamal algorithm and beaufort cipher algorithm for data security

Author(s)

HANDRIZAL Department of Computer Science, Faculty of Computer Science and Information Technology, Universitas Sumatera Utara, Jl. University No. 9-A, Medan 20155, Indonesia

FAUZAN NURAHMADI Department of Computer Science, Faculty of Computer Science and Information Technology, Universitas Sumatera Utara, Jl. University No. 9-A, Medan 20155, Indonesia

SILVIA DEWI SIREGAR Department of Computer Science, Faculty of Computer Science and Information Technology, Universitas Sumatera Utara, Jl. University No. 9-A, Medan 20155, Indonesia

Abstract

Exchanging information is very important in our public. We often exchange information in the form of files with the *.docx extension. To maintain the security of the information, it is necessary to have a data security system. In this study, a data security solution for string data is given by using cryptography. The Hybrid Cryptosystem method will be applied to the ElGamal Algorithm and the Beaufort Cipher Algorithm to provide a high level of information security. Beaufort Cipher Algorithm will be used to encrypt and decrypt files with *.docx extension and ElGamal Algorithm will be used for Beaufort Cipher's key encryption and decryption process. The results of this study indicate that the processing time required encryption and decryption process in the Beaufort Cipher Algorithm and ElGamal Algorithm is linearly compared to the length of the character in the file. The times required for the encryption process in both algorithms are longer than the time required for the decryption process.

Publication Details

Page(s) 2111-2118

DOI DOI not available

Published Journal: Journal of Theoretical and Applied Information Technology, Volume: 100, Issue: 7, Year: 2022

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Keywords

cryptography, Hybrid Cryptosystem, ElGamal, Beaufort Cipher

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