“What you gonna do when you get out of jail?…” part 330

I was reminded last night that the National Security Agency has a YouTube channel.

I’m not ready to post the video that reminded me yet: that will come up next time I want to do a radio post. However, I thought I’d do both some more history, and something I haven’t done in quite a while: cryptography.

Also, I’m posting three of these, but they are all fairly short. I’ve been running long for a while now, and figure youse guys could use some short history as a break.

“Cryptology in the American Revolution: Ciphers” part 1:

Part 2:

Part 3:

And a bonus for people who would like something a little more recent: “Civil War Signals”.

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