BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//archive.cryptologicfoundation.org//NONSGML kigkonsult.se iCalcrea
 tor 2.30.10//
CALSCALE:GREGORIAN
METHOD:PUBLISH
UID:93ccd910-31be-49fd-a64a-477807866bdd
X-WR-CALDESC:13 April 1889: Birthday of cryptologic pioneer Herbert O. Yard
 ley.\n\nHerbert O. Yardley was commissioned a lieutenant in 1917\, and tas
 ked with setting up U.S. Army Code and Cipher Section\, MI-8. The fledglin
 g Cipher Bureau (The Black Chamber) had quite a few remarkable successes. 
 Yardley eventually wrote a book about the Cipher Bureau\, entitled 'The Am
 erican Black Chamber.' The book was filled with good stories well told\, a
 s well as frank descriptions of Yardley's successes in cryptanalysis. It w
 as a best-seller in 1932 -- overseas as well as domestically.\n\nWhile man
 y of his former colleagues and those now engaged in military cryptanalysis
  were appalled at the revelations in his book\, Yardley defended his publi
 cation. He claimed self-righteously that his only motive had been to alert
  the United States to the weakness of its own systems and to the power of 
 cryptanalysts. What he could do\, he said\, people in other nations could 
 also do. \n\nYardley also wrote a book\, 'Japanese Diplomatic Secrets' in 
 which he made heavy use of actual messages he'd intercepted from Japan. Th
 e book was seized by the U.S. government in 1933 for national security rea
 sons. \n\nLearn more via the links below and don't miss The Black Chamber 
 display at the National Cryptologic Museum.
X-WR-RELCALID:cdae9ef48567595ba55138b9bfce703f
X-WR-TIMEZONE:America/New_York
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:STANDARD
TZNAME:EST
DTSTART:20251102T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
RDATE:20261101T020000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:EDT
DTSTART:20260308T020000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
RDATE:20270314T020000
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:7bf5035b-aa2f-45bf-b678-b1af346e7eed
DTSTAMP:20260424T045140Z
DESCRIPTION:13 April 1889: Birthday of cryptologic pioneer Herbert O. Yardl
 ey.\n\nHerbert O. Yardley was commissioned a lieutenant in 1917\, and task
 ed with setting up U.S. Army Code and Cipher Section\, MI-8. The fledgling
  Cipher Bureau (The Black Chamber) had quite a few remarkable successes. Y
 ardley eventually wrote a book about the Cipher Bureau\, entitled 'The Ame
 rican Black Chamber.' The book was filled with good stories well told\, as
  well as frank descriptions of Yardley's successes in cryptanalysis. It wa
 s a best-seller in 1932 -- overseas as well as domestically.\n\nWhile many
  of his former colleagues and those now engaged in military cryptanalysis 
 were appalled at the revelations in his book\, Yardley defended his public
 ation. He claimed self-righteously that his only motive had been to alert 
 the United States to the weakness of its own systems and to the power of c
 ryptanalysts. What he could do\, he said\, people in other nations could a
 lso do. \n\nYardley also wrote a book\, 'Japanese Diplomatic Secrets' in w
 hich he made heavy use of actual messages he'd intercepted from Japan. The
  book was seized by the U.S. government in 1933 for national security reas
 ons. \n\nLearn more via the links below and don't miss The Black Chamber d
 isplay at the National Cryptologic Museum.
DTSTART;TZID=America/New_York:20260413T060000
DTEND;TZID=America/New_York:20260413T060001
LOCATION:
SUMMARY:1889: Herbert O. Yardley's birth date.
END:VEVENT
END:VCALENDAR