[Cryptography] Tempest and limits on receiving

[grarpamp]

> That law was adopted in the US for consumer privacy reasons back when
> cell service was analog and unencrypted, and cellular conversations
> could be listened to with an off-the-shelf scanner.  It is less
> relevant today, but still on the books.

AMPS is long dead in the US, but you don't see that now
irrelavant and useless thing being removed from "law" do you.
(Well, more applicably, "cordless household phones", which
have also evolved somewhat beyond a simple fixed 800MHz
carrier. Regulate Technology vs. Act, stupid govt's.)