Protecting seaport communication system by steganography based procedures

Rival companies compete against each other in business and therefore they try to obtain data that is usually held in the hands of seaports. If a company succeeds to damage one of its rival companies, the company will increase in value. Therefore there is risk for any data in the hands of a port; in spite of this, there is no cybersecurity standard for the maritime industry or for enforcement agencies; despite the fact that the need of secure communication is indispensable. Still, using encrypted messages have a noteworthy disadvantage. Each person who sees the message recognizes that there is a cryptic message. This paper introduces a technique of Steganography, that is to say - transmitting encrypted messages in images compressed by the well known JPEG format. In point of fact, the system modifies the pictures a bit, but this modification is totally unnoticeable. The image seems to be an immaculate picture, while truly the picture does include some extra information.