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UID:e16073fb-1795-4f4a-83bb-770b8358db0a
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:20281105T020000
TZOFFSETFROM:-0400
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RDATE:20291104T020000
RDATE:20301103T020000
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DTSTART:20290311T020000
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UID:7c8a5117-2ef0-4f37-973d-a6ad17f2dc87
DTSTAMP:20260426T220302Z
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:20291019T000000
DTEND;TZID=America/New_York:20291019T235900
LOCATION:
SUMMARY:1875: Charles Wheatstone Died.
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