Wartime Crypto Laws

[Tim May]

On Wednesday, September 19, 2001, at 10:47 AM, Meyer Wolfsheim wrote:

> Gentlemen,
>
> It was recently mentioned on this list that there were additional
> restrictions placed on the use of ciphers by private citizens during 
> World
> War II. I'm curious if anyone knows of a good resource for further
> information on this topic.
>
> (Now, inevitably, Choate is going to sent me a Google URL. This is fine,
> since I wasn't able to get Google to give me anything but information on
> documents discussing recent export restrictions, happening to mention
> WWII.)
>
Kahn's book on Codes has much on WW II, including mail opening laws, 
restrictions on radio use, etc.

Computer crypto obviously didn't exist back then, so we need to look to 
letters, radio, microdots, etc. for what may be coming.


--Tim May