Aji, Bayu Purnomo
(2021)
Teknik Penyembunyian Pesan Pdf Terenkripsi Menggunakan Algoritma Twofish Dan Steganografi End Of File Dalam Media Gambar.
Other thesis, Universitas Islam Riau.
Abstract
Message is a secret statement made by someone and is intended for the desired person. In the process of sending messages, message security is a very important factor. One way of securing messages can be done by combining cryptography and steganography. The aim is to keep the messages sent that can be done by means of a cryptographic process secret, and at the same time to avoid the messages from suspicion which can be done by the steganography process. The message used in this study is a pdf file. In the cryptography process, the message in the form of a file will be encrypted using the Twofish method, and then the encrypted message will be steganographically processed by inserting information or messages into a file, where the information or message is inserted at the end of the file, using the End method of File (EOF). The result of this research is that by using a Twofish cryptographic method and Steganography in the insertion, the encrypted message is difficult to be returned to the original message by an unauthorized party. The result of this application is that it can insert a hidden message in the form of a pdf file into a digital image file in PNG / JPG format and can extract the hidden message from the image (stego-image).
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