Originally, we were thinking about this project as a component in a complete system for secure wireless digital communication. A complete system based on LFSR spread spectrum and strong encryption would require the following additional elements:
We made some headway on the first problem, and spent some time talking about the others. The hardest of these is probably designing the error-correcting encoding scheme in such a way that it could be implemented in hardware to support high data rates, and the RF design (if we were to do that part ourselves). The encryption front-and-back end is mostly a software problem, and the rest is digital interfacing.