Implementasi Pengamanan Text File Pada Hybrid Sistem Menggunakan Algoritma Vigenere dan Algoritma Adaptive Minimum Error Least Significant Bit Replacement (AMELSBR)

Abstract

The development of technology and the internet allows everyone to exchange data and
information. Problems arise when the information is confidential, especially for a company,
institution and also individuals who have important documents and data. Therefore, the security
of the data is a must. In this case cryptography plays a role of encrypting secret messages into
the form of unreadable messages and steganography that hides the irregular messages into the
image media, resulting in double security in the delivery of secret messages. In this research we
develop a hybrid system using Vigenere and AMELSBR with cover media in the form of (.jpg)
format as input (cover), file type (.png) as output (stegoimage) and data be inserted as a file with
text format. The conclusion of this research is that the hybrid system can be used to encrypt the
secret message and hide it into the cover media to make it more secure in data transmission.
Therefore, the use of AMELSBR method is good used in steganography. Stegoimage can
withstand the process of manipulating the brightness and contrast with the image record must
have the dominant black color value (rgb (0,0,0)) or white (rgb (255,255,255)) and not many
color variants, in other words the image can restore the file without experiencing excessive
reduction of meaning after the manipulation of brightness and contrast is an image with binary
image quality and grayscale image.