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X-WR-CALDESC:1 September 1939: The Army's SIS issued first PURPLE translati
 on. \n\nExcerpt from <a href='https://www.nsa.gov/History/Cryptologic-Hist
 ory/Historical-Events/Article-View/Article/2740690/red-and-purple/' target
 ='_blank' rel='noreferrer noopener'>NSA.gov article</a> - 'The solution of
  PURPLE was a team effort\, under the overall direction of William Friedma
 n\, with Frank Rowlett leading the day-to-day efforts. Genevieve Grotjan\,
  Albert Small\, and Samuel Snyder\, junior cryptanalysts\, also made impor
 tant contributions in solving the system.\n\nOnce the system had been solv
 ed\, William Friedman established what may have been the first compartment
  for intelligence information in the U.S. Decrypts were marked with the co
 deword 'MAGIC' to show they needed extra protection. According to the stor
 y\, Friedman chose this codeword because he liked to describe his cryptana
 lysts to outsiders as 'magicians.'\n\nWhen SIS personnel had solved the PU
 RPLE system\, they came up with the concept of building their own version 
 of the machine for faster decryption\, a device they called the 'PURPLE AN
 ALOG.' An electrical engineer in SIS named Leo Rosen produced a prototype\
 , according to legend\, constructed in his basement. Since the Army lacked
  the machine shop capabilities to make additional units\, SIS asked the Na
 vy to make PURPLE ANALOG copies in its facilities.'\n\nLearn more about th
 e Magic of Purple Exhibit via the link below.
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BEGIN:VEVENT
UID:8f7738f7-d416-4329-87c4-ec85e464b0d6
DTSTAMP:20260424T125734Z
DESCRIPTION:1 September 1939: The Army's SIS issued first PURPLE translatio
 n. \n\nExcerpt from <a href='https://www.nsa.gov/History/Cryptologic-Histo
 ry/Historical-Events/Article-View/Article/2740690/red-and-purple/' target=
 '_blank' rel='noreferrer noopener'>NSA.gov article</a> - 'The solution of 
 PURPLE was a team effort\, under the overall direction of William Friedman
 \, with Frank Rowlett leading the day-to-day efforts. Genevieve Grotjan\, 
 Albert Small\, and Samuel Snyder\, junior cryptanalysts\, also made import
 ant contributions in solving the system.\n\nOnce the system had been solve
 d\, William Friedman established what may have been the first compartment 
 for intelligence information in the U.S. Decrypts were marked with the cod
 eword 'MAGIC' to show they needed extra protection. According to the story
 \, Friedman chose this codeword because he liked to describe his cryptanal
 ysts to outsiders as 'magicians.'\n\nWhen SIS personnel had solved the PUR
 PLE system\, they came up with the concept of building their own version o
 f the machine for faster decryption\, a device they called the 'PURPLE ANA
 LOG.' An electrical engineer in SIS named Leo Rosen produced a prototype\,
  according to legend\, constructed in his basement. Since the Army lacked 
 the machine shop capabilities to make additional units\, SIS asked the Nav
 y to make PURPLE ANALOG copies in its facilities.'\n\nLearn more about the
  Magic of Purple Exhibit via the link below.
DTSTART;TZID=America/New_York:20260901T000000
DTEND;TZID=America/New_York:20260901T235900
LOCATION:
SUMMARY:1939: Army's SIS Translates PURPLE
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