Hiding and securing message on edge areas of image using LSB steganography and OTP encryption

Imperceptibility and security are the two most important things in StegoCrypt techniques. In this paper, we have proposed the technique of inserting messages to the edge of the image using the Least Significant Bit (LSB) algorithm. The image edge area is selected because human vision can't detect small changes in this area. To provide double protection of messages, applied encryption using one-time pad (OTP) algorithm. To strengthen the encryption result, message encryption process is not done directly but by converting it into binary message first. This way can result in more verbalized message encryption, thereby minimizing the chance of messages being deciphered by unauthorized parties. From the experimental results of this paper obtained a better imperceptibility value, where the value is measured by PSNR and MSE. Histogram of original image and stego image also shows great similarity identical. Meanwhile, message extraction can also be done perfectly with the value of Correlation Coefficient (CC) is 1.