The British also helped with the US Navy attack on Japanese ciphers, didn't they?
The Japanese did not place much time or emphasis on encryption. So, if by help you mean "vacuumed up" all the stuff that was out in the open that was easy to crack, then yes.
alt Hacker News
The Japanese did not place much time or emphasis on encryption. So, if by help you mean "vacuumed up" all the stuff that was out in the open that was easy to crack, then yes.