Methods used for the attack
Americans wondered how Japan's unexpected assault on the Pacific Fleet could have succeeded. The most important knowledge originated from breaking Japanese codes. Understanding the mystery messages of a threatening force is listening stealthily. It is the most dependably method of knowledge. It is quicker and more reliable than spies, who need to review and transmit their reports and who are constantly associated with setting up or falling for a misdirection. It sees more remote into the future than airborne surveillance, which recognizes just what is available. It is more extensive in scope than the cross examinations of detainees, who know minimal more than what they have encountered. It is typically less expensive…show more content… The name JN25 originated from the 25th Japanese Navy system which initially designated AN-1 as the current decryption job. The reason for the JN25 was that all messages were hidden by an enciphered code that was designated by Allied codebreakers and was introduced by the Imperial Japanese Navy on June 1, 1939. The purpose was to decipher the commands and operational needs of the Japanese fleet. The JN25 was used until the end of World War…show more content… The name given to the code, JN, was not cryptic as the JN stood for “Japanese Navy blue.” However, the uniqueness was because it was a security plans that the Japanese were using for the military news and the need to understand this code was important for the United States to defeat the Japanese. The main problem was that after all codes were deciphered, nine characters combinations remained; this code group meanings had to be inferred. Unscrambling the JN25 became a puzzle solving activity. With each meaning of a code group inferring a certain context, there could be another message as well by cross referencing with other characters. Codebreakers at Station HYPO were known for their tremendous computer memory, but they had extensive use of IBM punch-card sorting machines to find messages by using computer codes. The end result was a huge card catalog representing the inferences and deductions of code groups book. In order to fight against the Japanese throughout the remaining of the war turned out to be the most difficult job. However, it was eventually proven to be a success. The fact that Japan surprised the United States at Pearl Harbor demonstrated the need to improve the U.S. ability to know the enemy and to be one step ahead of their plans. While the United States intelligence agencies had been working seriously to crack the codes used by other countries, the need to
