By National Security Agency, Robert J. Hanyok, David P. Mowry
For historians and plenty of individuals of the knowledgeable public, the japanese assault on Hawaii provoked “the unending story.” a number of authentic investigations and personal old inquiries into the assault and its history have generated huge, immense shares of knowledge approximately either the yankee and jap aspects. it might be that we all know as a lot approximately December 7, 1941, as we do approximately any occasion within the final century, the Kennedy assassination most likely excepted. even though, regardless of this digital mountain chain of knowledge, details gaps nonetheless exist, and plenty of very important questions stay lower than dialogue or debate. The discussions and debates should not easily the province of conspiracy buffs. lecturers and different researchers drawn to global struggle II have a significant stake in settling the problems of the U.S.-Japan clash; certain solutions to a number of the controversies might both be sure or refute theories of the war’s origins and its that means. This assemblage of files, supplemented by means of the author’s transparent consultant to their which means, locations the reader, because it have been, correct in the midst of the behind-the-scenes occasions and is helping the coed and researcher to stick with them heavily.
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Extra resources for West Wind Clear: Cryptology and the Winds Message Controversy--A Documentary History
In 1935 the apartment of the Japanese naval attaché in Washington was burglarized, though nothing of value was found. Later, in May 1941, in one of the most brazen efforts, a team of navy and customs personnel boarded the Japanese merchant ship Nichi Shin Maru of the Pacific Whaling Steamship Company at Port Costa near San Francisco. They planted some drugs in the captain’s cabin and in the ensuing confusion confiscated his copy of the current merchant (Maru) code and several other documents dealing with communications.
It was not until around 1932 that the SIS began to attack foreign codes and ciphers. Even at that, the SIS was limited at what systems to try to solve, mainly diplomatic traffic. The major problem was that the Army still lacked a substantial intercept element to collect the messages. An early provisional unit at Fort Monmouth, New Jersey, began to monitor and copy some diplomatic and commercial messages in the mid-1930s, and these, by default, became the main target of SIS cryptanalysts. Early successes followed against Japanese manual systems like the early syllabary codes.
At the same time, independently of the Americans, the British and Dutch codebreakers in Singapore and Bandung were also exploiting the new manual system and its successors. By August 1941 the Gaimusho cryptographers were ready to activate the latest variant. Rowlett and his team were tipped to the new system by a message from Tokyo to Washington on 22 June 1941. 21 The first two messages in the new FUJI system were discovered to have been literally double superenciphered with the Purple machine.