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X-WR-CALDESC:15 December 1562: Death of Johannes Trithemius\, author of the
  oldest printed book on cryptology\, 'Polygraphiae.' He began writing the 
 book in 1508\, but it was not published until 1518. In fact\, Trithemius w
 rote several books and finished them quickly\, but they were not published
  until after his death. This photo is of the Museum's rare book exhibit\, 
 which includes a copy of 'Polygraphiae.' Visit the link below to learn abo
 ut the NCMF's acquisition of the publication by Trithemius from Dr. David 
 Kahn.\n\nThe major works of Trithemius include 'Steganographia\,' (which m
 eans in Greek\, 'hidden writing') written circa 1499\, 'Polygraphiae\,' a 
 cryptographic work\, and 'De Septum Secundeis\,' a history of the World ba
 sed on astrology.\n\nPolygraphiae remains the oldest book at the National 
 Cryptologic Museum. And if you look closely at the paper peeking from behi
 nd the cover\, in the early days of printing\, presses would use scraps of
  old manuscripts as filler material between the cover and the opening page
 s. Historians have discovered manuscripts that were thought to be lost—hid
 den within the covers of other books.\n\nTrithemius was also a magician. I
 n his trilogy -'Steganographia\,' books one and two were clearly systems f
 or encoding and were the first books written on cryptography. The third bo
 ok in the trilogy was more buried in the guise of occult astrology. Many t
 ook the writing literally and thought the numbers contained secrets to con
 juring spirits. Scholars\, however\, went further and discovered the writi
 ng contained a code and began working to decipher it. The messages encrypt
 ed in Trithemius's tables turned out to be somewhat ordinary sentences.
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DTSTAMP:20260425T141352Z
DESCRIPTION:15 December 1562: Death of Johannes Trithemius\, author of the 
 oldest printed book on cryptology\, 'Polygraphiae.' He began writing the b
 ook in 1508\, but it was not published until 1518. In fact\, Trithemius wr
 ote several books and finished them quickly\, but they were not published 
 until after his death. This photo is of the Museum's rare book exhibit\, w
 hich includes a copy of 'Polygraphiae.' Visit the link below to learn abou
 t the NCMF's acquisition of the publication by Trithemius from Dr. David K
 ahn.\n\nThe major works of Trithemius include 'Steganographia\,' (which me
 ans in Greek\, 'hidden writing') written circa 1499\, 'Polygraphiae\,' a c
 ryptographic work\, and 'De Septum Secundeis\,' a history of the World bas
 ed on astrology.\n\nPolygraphiae remains the oldest book at the National C
 ryptologic Museum. And if you look closely at the paper peeking from behin
 d the cover\, in the early days of printing\, presses would use scraps of 
 old manuscripts as filler material between the cover and the opening pages
 . Historians have discovered manuscripts that were thought to be lost—hidd
 en within the covers of other books.\n\nTrithemius was also a magician. In
  his trilogy -'Steganographia\,' books one and two were clearly systems fo
 r encoding and were the first books written on cryptography. The third boo
 k in the trilogy was more buried in the guise of occult astrology. Many to
 ok the writing literally and thought the numbers contained secrets to conj
 uring spirits. Scholars\, however\, went further and discovered the writin
 g contained a code and began working to decipher it. The messages encrypte
 d in Trithemius's tables turned out to be somewhat ordinary sentences.
DTSTART;TZID=America/New_York:20271215T060000
DTEND;TZID=America/New_York:20271215T060001
LOCATION:
SUMMARY:1562: Death of Johannes Trithemius
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