[Cryptography] SIGSALY, was a little bit of history

[John Levine]

>Under the assumption that this article is true, it tells a little bit
>of history that is new to me:
>
>http://99percentinvisible.org/episode/vox-ex-machina/
>
>[one-time pads, winning wars, etc.]

There's a lot of material about SIGSALY, which was an amazingly
advanced system, using vocoders, spread spectrum transmission, and one
time pads.

Here's the page at the NSA's online museum.  The Wikipedia article is pretty good, too.

https://www.nsa.gov/about/cryptologic_heritage/center_crypt_history/publications/sigsaly_story.shtml