[GreenKeys] Here's a sweet one on the bay. (crypto machines)

[Jim Haynes]

On Sat, 18 May 2013, Christian Gauger-Cosgrove wrote:

>
> During WWII, the US actually developed the "best" of the rotor cipher
> machines; it did require power drive, and was rather large. It was the
> SIGABA; which had a grand total of fifteen rotors, which were of the
> "Enigma" style wire scrambler rotors. As I mentioned in a previous
> e-mail; the SIGABA was not cracked until just a few years ago. At
> least publicly; if the NSA found a way to break it, they kept mum
> about that.
>
Also I've read that the U.S. issued new rotor sets once a year and had
a spare rotor set in reserve in case the in-use set was compromised.
Whereas Enigma got a couple of rotors added during the course of the
war but the same ones were used throughout.