The secure transmission of information from a source to a destination is typically handled via encryption algorithms. In many instances, data that may or may not undergo encryption prior to transmission can be manipulated to encode messages. With successful encodings, seemingly innocuous channels, e.g., documents, data streams, audio, video, can operate covertly for secret message transmission in various applications, e.g., collusion in finance, electronic information/auction markets, transaction sequences, advertising applets, simulation.