"I was thinking," Milgrim heard himself say, "about your IF. About the Volapuk. If the NSA can do what it says they can, here, then it should be pretty easy to fold a logarithm into the mix that would grab your Volapuk and nothing else. You wouldn’t even need much of a sample of their family dialect. You could just find half a dozen dialectal examples of the form and shoot for a kind of average. Anything that went through the phone system, after that, that had that tag, bingo. You wouldn’t need to be changing any more batteries on the IF’s coatrack."