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UID:22d077f2-6647-4616-acf5-8f710956ed1c
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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DTSTART:20261101T020000
TZOFFSETFROM:-0400
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RDATE:20271107T020000
RDATE:20281105T020000
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DTSTART:20270314T020000
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UID:0e4feaef-a0d8-4a06-a051-19f8b587e1ca
DTSTAMP:20260724T211759Z
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:20271019T000000
DTEND;TZID=America/New_York:20271019T235900
LOCATION:
SUMMARY:1875: Charles Wheatstone Died.
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