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X-WR-CALDESC:22 May 1881: Death of Friedrich Wilhelm Kasiski\, a German inf
 antry officer and cryptographer who developed a solution for polyalphabeti
 c cipher. In 1863\, Kasiski published a 95-page book on cryptography\, <i>
 Die Geheimschriften und die Dechiffrir-Kunst</i> (German\, 'Secret writing
  and the Art of Deciphering'). This was the first published account of a p
 rocedure for attacking polyalphabetic substitution ciphers\, especially th
 e Vigenère cipher.\n\nIn 2013\, the NCMF was fortunate to obtain a copy of
  <a href='https://cryptologicfoundation.org/community/cryptologic-history/
 museum-support/acquisitions/acquisitionarchivessection/books_publications_
 section/germancryptology_book.html' target='_blank' rel='noreferrer noopen
 er'>Kasiski's very rare 1863 German language book on cryptology from a pri
 vate European seller.</a>\n\nThe significance of Kasiski's cryptanalytic w
 ork was not widely realized at the time. Cryptologic historian Dr. David K
 ahn notes\, 'Kasiski died on May 22\, 1881\, almost certainly without real
 izing that he had wrought a revolution in cryptology.' (<i>The Codebreaker
 s</i>)
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DTSTAMP:20260424T083335Z
DESCRIPTION:22 May 1881: Death of Friedrich Wilhelm Kasiski\, a German infa
 ntry officer and cryptographer who developed a solution for polyalphabetic
  cipher. In 1863\, Kasiski published a 95-page book on cryptography\, <i>D
 ie Geheimschriften und die Dechiffrir-Kunst</i> (German\, 'Secret writing 
 and the Art of Deciphering'). This was the first published account of a pr
 ocedure for attacking polyalphabetic substitution ciphers\, especially the
  Vigenère cipher.\n\nIn 2013\, the NCMF was fortunate to obtain a copy of 
 <a href='https://cryptologicfoundation.org/community/cryptologic-history/m
 useum-support/acquisitions/acquisitionarchivessection/books_publications_s
 ection/germancryptology_book.html' target='_blank' rel='noreferrer noopene
 r'>Kasiski's very rare 1863 German language book on cryptology from a priv
 ate European seller.</a>\n\nThe significance of Kasiski's cryptanalytic wo
 rk was not widely realized at the time. Cryptologic historian Dr. David Ka
 hn notes\, 'Kasiski died on May 22\, 1881\, almost certainly without reali
 zing that he had wrought a revolution in cryptology.' (<i>The Codebreakers
 </i>)
DTSTART;TZID=America/New_York:20260522T060000
DTEND;TZID=America/New_York:20260522T060001
LOCATION:
SUMMARY:1881: Death of Friedrich Wilhelm Kasiski
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