[Cryptography] How crypto killed Admiral Yamamoto

[John Denker]

On 4/17/21 3:19 PM, Dave Horsfall wrote:

> On this day in 1943, Admiral Yamamoto (the architect of the Pearl
> Harbor attack) was shot down by a squadron of P-38 Lightnings that
> just "happened" to be loitering in the area at their extreme range
> where he was known to be
> 
> I think that it was "Purple" that was broken?

1) Virtually all Japanese codes were broken by the middle of the war. That includes PURPLE as well as JN-25 and others.

2) It was JN-25 that did in Yamamoto.

https://www.history.navy.mil/about-us/leadership/director/directors-corner/h-grams/h-gram-018/h-018-2.html