I'd be happy to collaborate on this project. I only know some Java, Mathematica, and Unix/GNU/Linux command line so I'll definitely need help with code.

While I might understand how to write, compile, and run a simple program totally within software like BlueJ or Mathematica, or run a few crypto commands from the command line, I don't know how to create an actual application that takes data from other running applications, sends and receives data through USB and ethernet, and implements the necessary crypto.

Well, I will have all the necessary hardware together soon, and then I can start figuring out how to program it. As for a timeline, I hope to get this thing at least semi-operational by the end of the summer, or if not, in the fall. Then improvements will continue to be made.