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X-WR-CALDESC:23 January 1941: Intelligence chiefs of the U.S. Army and Navy
  established a list of eligible readers of the 'Magic' intercept. Follow t
 he link at the bottom of the page to learn about the Magic of Purple exhib
 it at the NCM.\n\nThe Japanese 'Purple' code did not break easily. For eig
 hteen months cryptanalysts working for S.I.S. struggled with this difficul
 t Japanese diplomatic code. Then\, one day in September 1940\, Genevieve G
 rotian made a discovery that would change the course of history. By analyz
 ing and studying the intercepted coded messages\, she found a correlation 
 that no one else had yet detected. This breakthrough enabled other cryptan
 alysts to find similar links. \n\nWilliam Friedman and members of the S.I.
 S. built a crude model that was a remarkable imitation of Purple. Soon thi
 s product of American engineering and mathematical insight helped with rep
 roducing the most guarded Purple communications. So impressed was one USN 
 Rear Admiral that he called the process Magic\, and the nickname stuck. \n
 \nAlmost sixty years later\, Frank Rowlett\, a cryptologic pioneer and hea
 d of the 'Purple' team\, remembered that historic day when the code broke.
  'What [Genevieve] Grotjan did was a big step forward and was very signifi
 cant in the solution of Purple.' Her discovery\, and the work of other tea
 m members\, allowed the United States to read secret Japanese diplomatic m
 essages and to continue reading them throughout World War II.  Genevieve G
 rotjan's contribution to the Allied victory cannot be measured.\n\n
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DTSTART:20271107T020000
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RDATE:20281105T020000
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DTSTART:20270314T020000
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DTSTAMP:20260425T153158Z
DESCRIPTION:23 January 1941: Intelligence chiefs of the U.S. Army and Navy 
 established a list of eligible readers of the 'Magic' intercept. Follow th
 e link at the bottom of the page to learn about the Magic of Purple exhibi
 t at the NCM.\n\nThe Japanese 'Purple' code did not break easily. For eigh
 teen months cryptanalysts working for S.I.S. struggled with this difficult
  Japanese diplomatic code. Then\, one day in September 1940\, Genevieve Gr
 otian made a discovery that would change the course of history. By analyzi
 ng and studying the intercepted coded messages\, she found a correlation t
 hat no one else had yet detected. This breakthrough enabled other cryptana
 lysts to find similar links. \n\nWilliam Friedman and members of the S.I.S
 . built a crude model that was a remarkable imitation of Purple. Soon this
  product of American engineering and mathematical insight helped with repr
 oducing the most guarded Purple communications. So impressed was one USN R
 ear Admiral that he called the process Magic\, and the nickname stuck. \n
 \nAlmost sixty years later\, Frank Rowlett\, a cryptologic pioneer and hea
 d of the 'Purple' team\, remembered that historic day when the code broke.
  'What [Genevieve] Grotjan did was a big step forward and was very signifi
 cant in the solution of Purple.' Her discovery\, and the work of other tea
 m members\, allowed the United States to read secret Japanese diplomatic m
 essages and to continue reading them throughout World War II.  Genevieve G
 rotjan's contribution to the Allied victory cannot be measured.\n\n
DTSTART;TZID=America/New_York:20280123T000000
DTEND;TZID=America/New_York:20280123T235900
LOCATION:
SUMMARY:1941: Eligible readers of 'Magic' intercept are established.
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