Well, yes. I see your original point... it makes sense if you look at it from a perspective of communicating the information rather than a security perspective,

Well, yes. I see your original point... it makes sense if you look at it from a perspective of communicating the information rather than a security perspective, which is what I was focusing on. Of course, that all assumes that the receiver knows a priori they are receiving a key and what the key corresponds to. And assuming you wanted to set something like that up, there are a lot more dense ways to go about it. It reminds me of this: http://killscreendaily.com/articles/articles/we-went-looking-jason-rohrers-lost-board-game-didnt-make-it-very-far/ http://killscreendaily.com/articles/articles/we-went-looking... In other words, bury massive inheritance in the desert. Issue a list of 1,000,000 GPS coordinates. Then you only need 10 bits.