Aplikasi Steganografi Menggunakan LSB 4 Bit Sisipan dengan Kombinasi Algoritme Substitusi dan Vigenere Berbasis Android

Priyagung Hernawandra (Department of Informatics, STMIK Kharisma Karawang)
Supriyadi Supriyadi (Department of Informatics, STMIK Kharisma Karawang)
U. Tresna Lenggana (Department of Informatics, STMIK Kharisma Karawang)

Jurnal Teknologi dan Sistem Komputer
Volume 6, Issue 2, Year 2018 (April 2018)

This study aims to implement steganography with 4 bit LSB method combined with Vigenere and substitution encryption algorithms. This combination strengthens the security of text messages that are inserted into the image because the message is already a ciphertext as the result of the Vigenere and substitution encryption process. This steganography is realized as an application that runs on Android devices. This application can insert text messages that contain space characters and a combination of uppercase letters in a digital image. Using this application, insertion of messages into images causes the increase of images size by an average of 12.77% of the original size from 10 sample images.