Micro protocol engineering for unstructured carriers: On the embedding of steganographic control protocols into audio transmissions

摘要

Network steganography conceals the transfer of sensitive information withinunobtrusive data in computer networks. So-called micro protocols arecommunication protocols placed within the payload of a network steganographictransfer. They enrich this transfer with features such as reliability, dynamicoverlay routing, or performance optimization --- just to mention a few. Wepresent different design approaches for the embedding of hidden channels withmicro protocols in digitized audio signals under consideration of differentrequirements. On the basis of experimental results, our design approaches arecompared, and introduced into a protocol engineering approach for microprotocols.