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Ask Zelda

Ask Zelda Declassified Documents

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Ask Zelda Declassified Document

Communicators

Communicator Declassified

Communicator Declassified

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Communicator Declassifed

Cryptologic Almanac Articles

Cryptologic Almanac Articles - 2002 - Declassified Documents

Cryptologic Almanac Articles - 2002 - Declassified Documents

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Almanac Articles - 2002

Cryptologic Histories

History of the Signal Security Agency
Volume II The General Cryptanalytic Problems

Southeast Asia Working against the Tide

United States Cryptologic History Space Surveillance SIGNET Program

THE NATIONAL SECURITY AGENCY AND THE EC-121 SHOOTDOWN

The Suez Crisis: A Brief Comint History

Spartans in Darkness

The origin and Development of the
United States OPSEC Program

The Origins of the National Security Agency 1940-1952

Operation REGAL: The Berlin Tunnel

On Watch- Profiles from The National Security Agencys' past 40 years

It Wasn't All Magic: The Early Struggle to Automate Cryptanalysis 1930s - 1960s

Learning from the Enemy: The GUNMAN Project

In the Shadow of War

History of the Signal Security Agency
Volume I Organization Parts I and II

Volume II

A History of U.S. Communications Security Volume 1

German Clandestine Activities in South America in World War II

History of Collaboration among French Cryptologic Agencies 1909 - 1939

The Cryptology of the German Intelligence Services

American Cryptology During the Cold War 1945-1989 Book IV

Cryptologic Quarterly

Cryptologic Quarterly 2023-02 Volume 41

Cryptologic Quarterly 2021-01 Volume 40

Renaissance Cryptography Occultism and the Jewish Cabala
The Dawn of American Communications Intelligence: The Spanish-American War and After
NSA's Senior Technical Development Program Turns Twenty
Farmhouse Field Station Houlton Maine: The U.S. Army's First Fixed Field Site
The Thought behind High-Level Cryptological Discovery 1930-1945

Release of the William and Elizebeth Friedman Collection
William Bundy at Bletchley Park
How Modular Arithmetic Helped Win World War II
Two Cryptologic Nights at the Cinema

History and Transparency: Two Years at a Glance!
Family Album—Vint Hill Farms Station
The Evolution of Signals Security as a Counterintelligence Discipline
The STONEHOUSE of East Africa
A Layman's Guide to the Mysteries of Linguistics
A Space Worthy of its Namesakes: The Friedman Conference Center

What CCH Can Do for You: Make History Relevant!
Decryption in Progress: The Sino-Japanese War of 1894-1895
A Nineteenth-Century SIGINT Success
The Cryptologist's War: How World War I Helped Weave the "Cloak" of Cryptologic Secrecy
Ann's War: One Woman's Journey to the Codebreaking Victory over Japan
Best-Laid Plans: Establishing the Armed Forces Security Agency Legal Counsel
Before the Dawn: Life at a Remote SIGINT Site during the Cold War

Cryptologic Quarterly Articles

Fall/Winter 1983-Vol. 2, Nos. 3-4

Spring 1985-Vol. 4, No. 1

Winter 1995 - Vol. 14, No. 4

Spring 1995-Vol. 14, No. 1

Winter 1987-Vol. 5, No. 4

Spring 1982-Vol. 1, No. 1

Fall/Winter 1983-1984-Vol. 2, Nos. 3-4

Spring 1989-Vol. 8, No. 1

Fall/Winter 1993-Vol. 12, Nos. 3-4

Fall/Winter 1991-Vol. 10, Nos. 3-4

Fall/Winter 1983-Vol. 2, Nos. 3-4

Spring/Summer 1984-Vol. 3, Nos. 1-2

Spring 1987-Vol. 6, No. 1

Spring/Summer 2001-Vol. 20, Nos. 1-2

Fall/Winter 1987-1988 - Vol. 6, Nos. 3-4

Winter 1989 - Vol. 7, No. 4

Spring/Summer 2001-Vol. 20, Nos. 1-2

Spring 1994-Vol. 13, No. 1

Winter 1996-Vol. 15, No. 4

Summer/Fall 1982-Vol. 1, Nos. 2-3

Cryptologic Spectrum Articles

Cryptologic Spectrum Articles Disclamer

Summer 1970 Vol. 1, No. 2

Spring 1980 - Vol. 10, No. 2

Summer 1980 - Vol. 10, No. 3

Winter 1978 - Vol. 8, No. 1

Winter 1978 - Vol. 8, No. 1

Fall 1976 - Vol. 6, No. 4

Winter 1981 - Vol. 11, No. 1

Fall 1980 - Vol. 10, No. 4

Fall 1974 - Vol. 4, No. 5

Spring 1973 - Vol. 3, No. 2

Spring 1975 - Vol. 5, No. 2

Spring-Summer 1973 - Vol. 3, Nos. 2-3

Summer 1974 - Vol. 4, No. 3

Spring 1980 - Vol. 10, No. 2

Summer 1972 Vol. 2, No. 3

Fall 1975 - Vol. 5, No. 4

Spring 1981 - Vol. 11, No. 2

Spring 1974 - Vol. 4, No. 2

Summer 1981 - Vol. 11, No. 3

Cryptologs

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

Collection of Cryptologs - Declassified Documents

History of the Army Security Agency

Homework by Dr. Werner Weber

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History of the Army Security Agency

History Today Anthologies

History Today Anthologies: On The Roof Gang

History Today Anthologies: On The Roof Gang

History Today Anthologies: On The Roof Gang

History Today Anthologies: On The Roof Gang

History Today Anthologies: On The Roof Gang

History Today Anthologies: On The Roof Gang

History Today Anthologies: On The Roof Gang

History Today Anthologies: On The Roof Gang

History Today Anthologies: On The Roof Gang

History Today Articles

History Today - Battle of Long Tan: American SIGINT Assists the Australians and LBJ’s Holiday Memory: Honoring 1st Lieutenant John F. Cochrane

History Today - Non-Secret Encryption - a “SECRET” no longer

History Today - YP Kim – 2022 NSA Hall of Honor Inductee – HISTORY TODAY, 3 May 2023

History Today - Finding Ferner: The Story Behind the Re-discovery of a 2022 Cryptologic Hall of Honor Inductee – HISTORY TODAY, 28 March 2023

History Today - Battle of Long Tan: American SIGINT Assists the Australians

History Today - Happy 70th Birthday, Tower Federal Credit Union 2 March 2023

History Today 2 February 2023: Jimmy T

History Today - Lifting the Curtain on "No Such Agency" 17 February 2022

History Today Articles

History Today Articles

History Today Articles

History Today Articles

History Today Articles

History Today Articles

History Today Articles

History Today Articles

History Today Articles

History Today Articles

History Today Articles

History Today Articles

Military Cryptanalysis

Military Cryptanalysis

Military Cryptanalysis

Military Cryptanalysis

Military Cryptanalysis

NSA Early Computer History

NSA Early Computer History

NSA Early Computer History

NSA Early Computer History

NSA Early Computer History

NSA Early Computer History

NSA Newsletters

NSA Newsletter, October 1967

NSA Newsletters

NSA Newsletters

NSA Newsletters

NSA Technical Journal Articles

Fall 1980 - Vol. XXV, No. 4

Spring 1978 - Vol XXIII, No. 2

Spring 1979 - Vol. XXIV, No. 2

Summer 1976 - Vol. XXI, No. 3

Spring 1976 - Vol. XXI, No. 2

Fall 1975 - Vol. XX, No. 4

Summer 1978 - Vol. XXIII, No. 3

Fall 1974 - Vol. XIX, No. 4

Summer 1974 - Vol. XIX, No. 3

Winter 1973 - Vol. XVIII, No. 1

Winter 1973 - Vol. XVIII, No. 1

Fall 1973, Vol. XVIII, No. 4

Winter 1974 - Vol. XIX, No. 1

Fall 1973, Vol. XVIII, No. 4

Fall 1972 - Vol. XVII, No. 4

Spring 1975 - Vol. XX, No. 2

Summer 1972 - Vol. XVII, No. 3

Summer 1972 - Vol. XVII, No. 3

Winter 1972 - Vol. XVII, No. 1

Winter 1972 - Vol. XVII, No. 1

NSA/CSS

Settings, Keys, Hats, and Head Scratching: The Headline Puzzle

Center for Cryptologic History

Ninety Years of Assessing Civilian Cryptologic Performance at the National Security Agency

By Betsy Rohaly Smoot

Series VI | Volume 16

Center for Cryptologic History
Revised edition 2024
(original title: “Efficiency Rating” to “Contribution Evaluations”: 90 Years of Assessing Civilian Cryptologic Performance)

NSA Directors: The Selection and Confirmation Process
A History and Lessons Learned Study

By Trumbull D. Soule

Center for Cryptologic History
First edition published 2022

Subject: Museum
Date: 2003
Format: Article

Subject: Mathematics
Date: 2003
Format: Article

Subject: Key Tape Production
Date: 2016
Format: Article

Subject: Books
Date:
Format: Article

Subject: NSA
Date:
Format: Brochure

Subject: Cryptology
Date: 2017
Format: Brochure

Subject: Traffic Analysis
Date: 2017
Format: Brochure

Subject: Anniversary
Date: 2002
Format: Brochure

Untangling the Web

Untangling the Web (PDF)

NSA/CSS Policies

NSA/CSS POLICY 12-3: ANNEX A

NSA/CSS POLICY 12-2: MISSION COMPLIANCE AND INTELLIGENCE OVERSIGHT

NSA/CSS POLICY 12-1: CIVIL LIBERTIES AND PRIVACY PROGRAM

NSA/CSS POLICY 12-3: PROTECTION OF CIVIL LIBERTIES AND PRIVACYOF U.S. PERSON INFORMATION WHEN CONDUCTING NSA/CSS MISSION AND MISSION-RELATED ACTIVITIES

NSA/CSS Policies