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August 15, 2005
JN-25
Australian mathematics lecturer, Peter Donovan has revealed the weakness in Japan's wartime operational code the Allies designated "Japanese Navy 25" or JN-25. Apparently, the system was based on multiples of three or some such thing.
At the peak of activity around 35,000 people were engaged in Allied code breaking. During the Pacific War this involved intercepting Japanese radio waves and using a machine made from old cash register parts in the deciphering process. None of these devices are believed to remain today but Dr Donovan has made a working model.
"It's just wheels turning and being pushed by rods and you win when you've got the right pattern of colours," he said.
"It's just wheels turning and being pushed by rods and you win when you've got the right pattern of colours," he said.
Posted by Ghost of a flea at August 15, 2005 08:31 AM
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