Covert Communication Techniques in the Digital World

The boom of covert communication coincides with the appearance and growth of the Internet. The rapid spread of computer networks and shift to digitization of media has created a very favourable environment for covert communication. In this paper, some Covert communication techniques have been described. Covert or secure communication includes methods such as cryptography, steganography and watermarking. The process, some commonly used algorithms and potential applications of each of these techniques have been discussed below. Finally, the proposed method integrates the concepts of cryptography and steganography for covert communication.