National Security Agency (NSA) Collection

American Cryptology during the Cold War, 1945-1989

This book is intended to be a general overview of U.S. government cryptology since the end of World War II.…

November 22, 2023

NSA Report to the President’s Intelligence Oversight Board (IOB) for 4QT 2001

PURPOSE: To forward to the Intelligence Oversight Board (IOB) of the President's Foreign Intelligence Advisory Board, via the Assistant to…

November 22, 2023

On Watch: Profiles from the National Security Agency’s Past 40 Years, 1984

On July 17, 1984, Lieutenant General Lincoln D. Faurer, the Director of the National Security Agency, asked the National Cryptologic…

December 7, 2022

Research Initiatives Presentation, Dr. Deborah Frincke, Director, NSA/CSS Research Directorate, 22 December 2016

In 2016, Dr. Deborah Frincke, Director, NSA/CSS Research Directorate, created this Top Secret PowerPoint presentation about "research initiates" within the…

June 2, 2022

SIDToday Newsletters – NSA Signals Intelligence Directorate Internal Newsletter

SIDtoday is the internal newsletter for the NSA’s Signals Intelligence Directorate. Below, you will find issue released via the FOIA…

January 11, 2022

The Maya Astronomical Computer, by Charles H. Lacombe and [REDACTED], Winter 1977

This paper presents evidence of a visual astronomical computer which would have enabled Maya astronomer-priests to accomplish complex astronomical calculations…

October 1, 2021

NSA/CSS Strategy, Published June 2010

Background From the document: "The digital revolution has clearly placed the National Security Agency/Central Security Service (NSA /CSS) in a…

May 1, 2021

National Security Agency (NSA) ADMS “Document Management System” Printouts

Background In the beginning of 2016, I requested under the Freedom of Information Act (FOIA) and printout of documents listed…

December 21, 2020

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

NSA COMINT REPORT: Capital Projects Planned in India, August 31, 1972

Background The following document was first received by the National Security Archive many years ago, but it is unclear when…

November 26, 2020