shootergame.exe ftw!

The comment I replied to did ask about making a sonar network, so I'll ask - how are you going to encrypt your sonar to make the location info they inherently contain private?

If using sonar as a communication means, that's fair I suppose, despite being obscenely inefficient. But I don't think anyone was asking "can we make a network with sound waves instead of radio waves" because the answer would be obvious.

I interpreted it as numerous pulse devices which would make a continually up to date sonar map, which would then inherently be available to anyone within the mapped area if the emitters didn't continuously move on an undeterminable path.

This comment is primarily just explaining that I guess we interpreted the question differently.

How're you going to encrypt the direction of origin from a sound wave bouncing off something?

I can't think how you could ever make it so that only friendlies could use it, unless the pulse emitting devices were moving, on a pre-known pattern.