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Steganography Based Seaport Security Communication System

There is threat for any data in the hands of a port; however, there is no cybersecurity standard for the maritime industry or for enforcement agencies; though the need of secure transmission is essential. Nevertheless, using encrypted messages have a significant disadvantage. Everyone who sees the message knows there is a secret message. This paper presents a way of Steganography, to be exact - transmitting encrypted messages in images compressed by JPEG format. The algorithm actually changes the pictures a bit, but this change is unnoticeable. The image seems to be an innocent picture, while actually it does contain a data.