Editing William F. Friedman (section)

== Death and legacy ==
[[File:Friedman Lectures on Cryptology.pdf|thumb|Declassified copy of confiscated 1965 "Friedman Lectures on Cryptology"|alt=]]

Friedman's health began to fail in the late 1960s, and he died in 1969.<ref name=EveningStar-WilliamFriedman-Obit-1969>{{cite news|title=William Friedman Dies; Broke Japanese Code|url=http://marshallfoundation.org/library/wp-content/uploads/sites/16/2015/03/Xerox3088.pdf|work=[[The Washington Star|The Evening Star]]|date=3 November 1969|page=B-7|access-date=27 September 2017|archive-date=29 July 2016|archive-url=https://web.archive.org/web/20160729141111/http://marshallfoundation.org/library/wp-content/uploads/sites/16/2015/03/Xerox3088.pdf|url-status=dead}}</ref><ref name=NYTimes-WilliamFriedman-Obit-1969>{{cite news|title=William Friedman Dies; Broke Japanese Code; Truman Gave Cryptanalyst Highest Civilian Award; Marshall Said Work Saved Many American Lives|url=https://timesmachine.nytimes.com/timesmachine/1969/11/03/79433021.pdf|work=[[The New York Times]]|date=2 November 1969|language=en}}&nbsp;{{Open access}}</ref> Friedman and his wife Elizebeth are buried in [[Arlington National Cemetery]].<ref name=Elonka-ArlingtonNationalCemeteryGrave-2017>{{cite news|last1=Dunin|first1=Elonka|title=Cipher on the William and Elizebeth Friedman tombstone at Arlington National Cemetery is solved|url=http://elonka.com/friedman/FriedmanTombstone.pdf|work=Elonka.com|date=17 April 2017}}</ref><ref name=Google-Maps-Streetview>{{cite news|title=Google Maps Streetview of Grave at Arlington National Cemetery|url=https://www.google.com/maps/@38.8699725,-77.0680082,3a,49y,183.2h,82.97t/data=!3m6!1e1!3m4!1sG1JMMwV_cAv4V0ce3f-jdQ!2e0!7i13312!8i6656}}</ref>

Friedman and his wife donated their archives to the library of the [[George C. Marshall Foundation]], which also has had material reclassified and removed by the NSA.<ref name=FriedmanCollection-AnalyticalGuide-2014>{{cite book|last1=Sheldon|first1=Rose Mary|title=The Friedman Collection: An Analytical Guide|date=2014|url=http://marshallfoundation.org/library/wp-content/uploads/sites/16/2014/09/Friedman_Collection_Guide_September_2014.pdf|access-date=2022-11-20|archive-date=2021-11-06|archive-url=https://web.archive.org/web/20211106201729/http://marshallfoundation.org/library/wp-content/uploads/sites/16/2014/09/Friedman_Collection_Guide_September_2014.pdf|url-status=dead}}</ref>

Friedman has been inducted into the [[Military Intelligence Hall of Fame]] and there is a building named after William and Elizebeth at the NSA complex at [[Fort Meade]] in Maryland. He was also presented the [[Medal for Merit]] by President [[Harry Truman]], and the [[National Security Medal]] by [[Dwight Eisenhower]].

Friedman has the distinction of having one of the longest known suppressed patent applications, for {{US patent|6097812}}, a patent for a "cryptographic system". It was filed on July 25, 1933, issued on August 1, 2000.

Friedman Hall, located on [[Fort Huachuca]], [[Arizona]], is named in his honor.