Data hiding based information security applications on network communication

Information has become an invaluable place throughout human history. Different methods are used for the transmission of secret information to recipients without understanding third parties. The main of these methods are to encrypt information using cryptographic methods or to hide information with steganographic methods. Activities such as processing, sharing, production of the information have been accelerated with the invention of the computer. For more effective information sharing, computer networks have been created and standards have been developed. In this study, basic computer network protocols are investigated. Attack methods that are threatening information systems with the exploitation of these protocols are comprehensively examined. Information is given about information hiding and hidden channels. Secret data transmission methods in computer networks are explored and presented. Examples of secret data transmission have been carried out. Additionally, new packet timing based and IP ID based network steganography methods are proposed. The bandwidth of the proposed timing method is higher than previous methods. The proposed IP ID based method is more effective to ensuring uniqueness of the ID field according to previous methods, and is suitable for sending secret data over the Internet.