[FreedomPoster]

On that last, if we’d have just busted the guys using the codes, the Japanese would have caught on pretty quickly and changed up their codes.

[Rockingham]

We could have put the Japanese off the scent by attributing the round up of Japanese spy rings to informers, to alert citizens, or to slip ups by the spies themselves. In any event, since we could not zero in on those spy rings, we never faced having to contrive cover stories as to how we rounded them up.

Oddly, the Chicago Tribune revealed that the US won the Battle of Midway because we broke the Japanese naval code, but the Japanese missed or ignored it. The Japanese were complacent about US code breaking abilities because they regarded their codes as having innate extra security in that they saw their language as too difficult for enough foreigners to master so as to equip an effective enemy code breaking enterprise.