Quote:
Originally Posted by Nick Beale
But didn't, apparently, and I doubt they could have overcome the machine ciphers (TypeX) that the RAF was using, not least because they believed their own machine ciphers were inviolable.
I can't remember if they were breaking the Royal Navy's codes as well as the Convoy Codes (based on code books) used by the Merchant Navy.
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Thank you for the information that the RAF used TypeX which, you are correct to say, the Germans never even tried to crack as it was based on their 'unbreakable' Enigma.
The problem therefore was only naval. I thought it was systemic. The RN did not adopt CCM (the machine that allowed TypeX to communicate with the US ECM II) until June 1943.
Until then they used Navy Cipher Number 3, which the Germans called 'Convoy Code', and could decipher. BP knew the Germans were reading it and warned the RN, who ignored the warning and continued with near-catastrophic results.
It's explained here:
http://www.independent.co.uk/news/uk...es-648269.html
Tony