Text to image encryption technique using RGB substitution and AES

Abstract

In this less secure cyber world, our proposed system will provide a way to transfer the data more securely. In this paper, we propose an android application having a method to transform the text into an image using an RGB substitution and then encrypt the resulting image using AES encryption algorithm. In this approach the secret key is smartly sent along with the cipher text in a single transmission. So that this method is capable of solving the key exchange problem that normally arises in encryption models. The encryption and decryption process make use of a combination database on both sender and receiver side, for text to image transformation. On this encrypted image, one more pixel is added, which stores the value of combinational number that was used to transform the text into image. The key which was used with the AES algorithm is transformed into its equivalent RGB resultant value. Finally the resultant value and image generated are transferred to the destination host. Reverse steps are applied at the receiver side to perform decryption. The proposed system which when implemented will lead to a highly secured transmission of the text.