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X-WR-CALDESC:23 April 1869: Birthday of cryptologic machine designer Edward
  Hebern.\n\nThe National Cryptologic Museum has two very rare five-rotor H
 ebern cipher machines in its collection. The Hebern Electric Company built
  what is acknowledged to be the first five-rotor cipher machine in the 192
 0's (a number of others were designed independently about the same time). 
 Unfortunately for Mr. Hebern\, both William Friedman and Agnes Myer Drisco
 ll were able to solve messages encrypted on it\, so the U.S. Army and the 
 U.S. Navy never used his rotor-based machine.  Although this machine was n
 ever widely manufactured or used\, it is cryptologically significant as pa
 rt of the overall evolution in U.S. manufactured rotor devices. We believe
  these two five-rotor machines are the only two that have survived. Financ
 ial assistance to acquire the Heberns came from an anonymous donor. See li
 nk below.
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DTSTART:20251102T020000
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DTSTART:20260308T020000
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DTSTAMP:20260424T065406Z
DESCRIPTION:23 April 1869: Birthday of cryptologic machine designer Edward 
 Hebern.\n\nThe National Cryptologic Museum has two very rare five-rotor He
 bern cipher machines in its collection. The Hebern Electric Company built 
 what is acknowledged to be the first five-rotor cipher machine in the 1920
 's (a number of others were designed independently about the same time). U
 nfortunately for Mr. Hebern\, both William Friedman and Agnes Myer Driscol
 l were able to solve messages encrypted on it\, so the U.S. Army and the U
 .S. Navy never used his rotor-based machine.  Although this machine was ne
 ver widely manufactured or used\, it is cryptologically significant as par
 t of the overall evolution in U.S. manufactured rotor devices. We believe 
 these two five-rotor machines are the only two that have survived. Financi
 al assistance to acquire the Heberns came from an anonymous donor. See lin
 k below.
DTSTART;TZID=America/New_York:20260423T060000
DTEND;TZID=America/New_York:20260423T060001
LOCATION:
SUMMARY:1869: Birthday of Cryptologic Machine Designer\, Edward Hebern.
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