[ARC5] How the U.S. Cracked Japan's 'Purple Encryption"

[Robert Eleazer]

Sometimes the intercepted messages are used to prove that FDR must have known about the impending Japanese attack.  But in reality the messages used to justify that argument were not decoded until after WWII.  The resources required to decode the messages were limited and not all messages that could have been decoded were at the time.

By the way the following link has an article on a station that intercepted diplomatic messages in WWII:  https://archive.org/details/StationPointGreyAndVerySpecialIntelligencePart1_930

Wayne
WB5WSV

        
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