Data security improvements on cloud computing using cryptography and steganography

Abstract

Cloud computing is a service that eases its users to store data on the internet. However, cloud computing has lack, which is related to stored data security specifically to image file that can be manipulated easily. To improve the data securities of JPG file type on cloud computing, the combination of advanced encryption standard (AES) cryptography and least significant bit (LSB) steganography methods is required. This study implemented AES 128 algorithm cryptography process to scramble the messages that will be inserted and LSB steganography to hide the messages that has been scrambled. The data were assessed using Stegspy. The results of this study indicated that cloud computing service of Platform as a Service (PaaS) has resulted ciphertext that was attached to JPG/JPEG images using Least Significant Bit (LSB). From 5 (five) samples, the encryption result testing on JPG/JPEG files was bigger than the original file. The bigger the number of characters of the inserted text, the bigger the size of JPG/JPEG files will be.