What about a Tunnel Diode? On Sunday, July 20, 2014 3:45 PM, Jarrod B <jarrodsb@xxxxxxxxx> wrote: Electronically a diode only allows current to only flow one way.....is that good enough for a bonus point? jrod On Sat, Jul 19, 2014 at 8:31 PM, coderman <coderman@xxxxxxxxx> wrote: i am trying to find the first reference to "data diodes" in any NSA >documents or leaks. > >bonus points for background on where this technical structure >originated and why :) > >best regards, > >