Cryptology

History of Special Project Branch, SIS ETOUSA, aka the “BEECHNUT Report” or “Rowlett Report,” written by Col. Frank B. Rowlett

The following document chronicles the history of the "Special Project Branch, SIS ETOUSA". It was originally requested from the National…

October 25, 2022

Cryptolog (NSA Newsletter), October 1981 Edition

Background Cryptolog was created in 1974 and was, according to the editor, “a new vehicle for the interchange of ideas…

December 19, 2020

The Bissell Report of 18 February 1965 – Review of Selected NSA Cryptanalytic Efforts

Background Richard Bissell Jr. was a Central Intelligence Agency officer responsible for major projects such as the U-2 spy plane…

December 3, 2020

United States Cryptologic History, Space Surveillance SIGINT Program, Originally Drafted in 1968

Background The Space Surveillance Sigint Program came into existence in the early 1960s when both the United States and the…

May 16, 2019

The CIA’s Kryptos Statue

Background Kryptos is an encrypted sculpture by American artist Jim Sanborn located on the grounds of the Central Intelligence Agency…

November 5, 2018

The Voynich Manuscript – National Security Agency (NSA) Documents

Background According to Wikipedia: The Voynich manuscript is an illustrated codex hand-written in an unknown writing system. The vellum on which it is written has been carbon-dated to the…

August 24, 2017

Martin and Mitchell Defection to Soviet Union, September 1960

The following was written by Wikipedia, which summarizes this historical incident: The Martin and Mitchell Defection occurred in September 1960…

July 22, 2015

The Beale Ciphers

(Scroll Down for Declassified Documents) The following is a great write up by Wikipedia of what "The Beale Ciphers" or…

July 3, 2015

NSA Newsletters

The following are the official NSA newsletters that have been released to date to The Black Vault.  Simply click on…

February 28, 2015

Communicator – NSA’s Employee Publication

The following are the declassified issues of the Communicator - NSA's Employee Publication. Just click on the corresponding issue to…

February 28, 2015