General Discussions
This is the place to discuss general issues related to the U-boat war or the war at sea in WWII.
RE: German Codebreaking
Posted by:
Marc Haldimann
()
Date: March 19, 2001 07:15PM
<HTML>Hi Frank,
Though I\'m not a specialist on this topic, I just chanced to read an excellent chapter on that matter in Gannon\'s book, Black May.
Gerrmany\'s B-Dienst (Funkboebachtungsdienst) gained early on access to some of the british codes used by the Navy and the Merchant Navy early on, as for the Naval Code .
But the big brakethrough was at first the partial than the almost complete decryption of Naval Cipher 3, introduced in October 1941 for use by the British, Canadian and US navies in the Atlantic and also commonly refered to as the Anglo-American Convoy Cipher. By February 1942, 80% of this code, used mainly to organize and monitor the convoys, was read by the german B-Dienst, and this enabled often Dönitz to put his U-boats at or near the right spot for spotting the convoys.
For more details, take a look in Gannon\'s excellent work:
Gannon, Michael (1998), Black May, Harper Collins; and specially chapter 2 \"The war at sea\", p. 52.
Regards
Marc Haldimann
</HTML>
Though I\'m not a specialist on this topic, I just chanced to read an excellent chapter on that matter in Gannon\'s book, Black May.
Gerrmany\'s B-Dienst (Funkboebachtungsdienst) gained early on access to some of the british codes used by the Navy and the Merchant Navy early on, as for the Naval Code .
But the big brakethrough was at first the partial than the almost complete decryption of Naval Cipher 3, introduced in October 1941 for use by the British, Canadian and US navies in the Atlantic and also commonly refered to as the Anglo-American Convoy Cipher. By February 1942, 80% of this code, used mainly to organize and monitor the convoys, was read by the german B-Dienst, and this enabled often Dönitz to put his U-boats at or near the right spot for spotting the convoys.
For more details, take a look in Gannon\'s excellent work:
Gannon, Michael (1998), Black May, Harper Collins; and specially chapter 2 \"The war at sea\", p. 52.
Regards
Marc Haldimann
</HTML>
| Subject | Written By | Posted |
|---|---|---|
German Codebreaking
|
Frank Blazich | 03/19/2001 03:20AM |
|
RE: German Codebreaking
|
Marc Haldimann | 03/19/2001 07:15PM |
|
RE: German Codebreaking
|
Roy Prince | 03/19/2001 11:54PM |