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UID:b4811ae3-6853-4f35-b449-d6fd5203a427
X-WR-CALDESC:19 October 1875: Charles Wheatstone\, inventor of the Playfair
  Cipher and the Wheatstone Cryptograph\, died. The Playfair Cipher is a ma
 nual symmetric encryption technique and was the first literal digraph subs
 titution cipher. The Wheatstone Cryptograph was a pre WW I-era cipher devi
 ce used extensively by the British during WW I. Learn more about it <a hre
 f='https://cryptologicfoundation.org/community/museum-support/acquisitions
 /acquisitionarchivessection/codeandcipher_items/wheatstone_cryptograph.htm
 l'>HERE</a>.
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X-WR-TIMEZONE:America/New_York
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DTSTART:20271107T020000
TZOFFSETFROM:-0400
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RDATE:20281105T020000
RDATE:20291104T020000
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DTSTART:20280312T020000
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RDATE:20300310T020000
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UID:a01fc2c3-5975-4c99-abc6-50dca2cccbff
DTSTAMP:20260426T051256Z
DESCRIPTION:19 October 1875: Charles Wheatstone\, inventor of the Playfair 
 Cipher and the Wheatstone Cryptograph\, died. The Playfair Cipher is a man
 ual symmetric encryption technique and was the first literal digraph subst
 itution cipher. The Wheatstone Cryptograph was a pre WW I-era cipher devic
 e used extensively by the British during WW I. Learn more about it <a href
 ='https://cryptologicfoundation.org/community/museum-support/acquisitions/
 acquisitionarchivessection/codeandcipher_items/wheatstone_cryptograph.html
 '>HERE</a>.
DTSTART;TZID=America/New_York:20281019T000000
DTEND;TZID=America/New_York:20281019T235900
LOCATION:
SUMMARY:1875: Charles Wheatstone Died.
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