NSA Cryptologic Histories

Internal histories (both declassified and unclassified) produced by NSA's Center for Cryptologic History or predecessor agencies. Histories are listed by their canonical series entry; histories will be left unsorted if no series is found. Click here for an index of internal NSA publications and articles.

Abbreviations in NSA Bibliographies

CCH = Center for Cryptologic History
CBB = Central Bureau Brisbane
CNSG = Commander, Naval Security Group Library (now transferred to NARA Record Group 38, Chief of Naval Operations)
FRUMEL = Fleet Radio Unit, Melbourne
FRUPAC = Fleet Radio Unit, Pacific
PSIS = Pacific Strategic Intelligence Section
RG457 = Record Group 457, National Security Agency/Central Security Service
SRH = Special Research History
SRMA = Discrete Records of Historical Cryptologic Import; U.S. Army
SRMD = Discrete Records of Historical Cryptologic Import; Joint Service and/or U.S. Government Cryptologic Agencies
SRMN = Discrete Records of Historical Cryptologic Import; U.S. Navy
SRNS = Summaries; Japanese Naval Radio Intelligence

Army Security Agency Histories

Series I - Pre-World War I

Volume 1 - Masked Dispatches: Cryptograms and Cryptology in American History, 1775–1900

Series II - World War I

Volume 2 - From the Ground Up: American Cryptology during World War I

Series III - Interwar Period

Series IV - World War II

Ciphers and Systems Referenced in NSA Records

Volume 1 - American Signal Intelligence in Northwest Africa and Western Europe
Volume 3 - German Clandestine Activities in South America in World War II
Volume 4 - The Cryptology of the German Intelligence Services
Volume 5 - A Priceless Advantage: U.S. Navy Communications Intelligence and the Battles of Coral Sea, Midway, and the Aleutians
Volume 6 - Pearl Harbor Revisited: United States Navy Communications Intelligence, 1924-1941
Volume 7 - The Quiet Heroes of the Southwest Pacific Theater: An Oral History of the Men and Women of CBB and FRUMEL
Volume 8 - A History of U.S. Communications Intelligence during World War II: Policy and Administration
Volume 9 - Eavesdropping on Hell: Historical Guide to Western Communications Intelligence and the Holocaust, 1939-1945
Volume 10 - West Wind Clear: Cryptology and the Winds Message Controversy - A Documentary History
Volume 11 - Cryptologic Aspects of German Intelligence Activities in South America during World War II

Special Research Histories

SRH-001 - Historical Background of the Signal Security Agency, Volume I: Codes and Ciphers Prior to World War I, 1776-1917
SRH-001 - Historical Background of the Signal Security Agency, Vol. II: World War I, 1917-1919
SRH-001 - Historical Background of the Signal Security Agency, Volume III: The Peace, 1919-1939
SRH-002 - War Secrets in the Ether Parts I-II
SRH-002 - War Secrets in the Ether Part III
SRH-004 - Six Lectures on Cryptology
SRH-006 - Synthesis in Experiences in the Use of ULTRA Intelligence by U.S. Army Field Commands in the European Theater of Operations
SRH-009 - Battle of the Atlantic, Volume One: Allied Communications Intelligence
SRH-010 - History of Converter M-325
SRH-011 - The Role of Communication Intelligence in Submarine Warfare in the Pacific (January 1943-October 1943), Vols. 1-8
SRH-012 - The Role of Radio Intelligence in the American-Japanese Naval War (August 1941-June 1942), Vols. 1-4
SRH 013 - ULTRA: History of U.S. Strategic Air Force Europe vs. German Air Forces
SRH-014 - Final Report of the Radio Intelligence Section, General Staff, General Headquarters, American Expeditionary Forces
SRH 015 - Notes on German Fuel Position
SRH-016 - Need for New Legislation Against Unauthorized Disclosures of Communications Intelligence Activities
SRH-019 - Blockade-Running Between Europe and the Far East by Submarines, 1942-44
SRH-020 - Narrative - Combat Intelligence Center - Joint Intelligence Center - Pacific Ocean Area
SRH-021 - Controlled Agent Communication Activities 1944-1945
SRH-022 - ULTRA and the U.S. Seventh Army
SRH-024 - German Naval Communication Intelligence, Vol. III: Compromise of Allied Ciphers
SRH-026 - Marshall Letter to Eisenhower on the Use of "ULTRA" Intelligence
SRH-027 - "Magic" Background Of Pearl Harbor Vol I: February 14, 1941 - May 12, 1941
SRH-029 - A Brief History of the Signals Intelligence Service
SRH-037 - Reports Received by U.S. War Department on the use of ULTRA in the European Theater, World War II
SRH-038 - A Selection of Papers Relating to Herbert O. Yardley
SRH-039 - Unit History, 2d Army Air Force Mobile Radio Squadron April 1945 - June 1946
SRH-040 - "MAGIC" Diplomatic Extracts
SRH-042 - Third Army Radio Intelligence History in Campaign of Western Europe
SRH-043 - Comment on Marshall - Dewey Exchange Concerning Pearl Harbor
SRH-044 - War Department Regulations Governing the Dissemination and Security of Communications Intelligence
SRH-045 - Reminiscences of LTC Howard W. Brown
SRH-050 - Riverbank Laboratory Correspondence 1919
SRH-061 - Allocation of Special Security Officers to Special Branch, Military Intelligence Service, War Department 1943-1945
SRH-094 - French Indo-China (Political Situation)
SRH-112 - Post Mortem Writings on Indications of Ardennes Offensive, December 1944
SRH-125 - Certain Aspects of "Magic" in the Cryptologic Background of the Various Official Investigations into the Pearl Harbor Attack
SRH-134 - Expansion of the Signal Intelligence Service from 1930-7 December 1941
SRH-142 - Ultra and the Campaign Against the U-Boats in World War II
SRH-143 - ULTRA in the Battle of Britain: The Real Key to Success?
SRH-149 - A Brief History of Communications Intelligence in the United States
SRH-150 - Birthday of the Naval Security Group
SRH-151 - Military Study Communication Intelligence Research Activities
SRH-152 - Historical Review of OP-20-G
SRH-154 - Signal Intelligence Disclosures in the Pearl Harbor Investigations
SRH-159 - Preliminary Historical Report on the Solution of the "B" Machine
SRH-161 - Permanent Organization for Code and Cipher Investigation and Attack (Plans for M.I.8.)
SRH-169 - Centralized Control of U.S. Army Signal Intelligence Activities
SRH-171 - Secondary Course in Cryptanalysis
SRH-210 - Collection of Papers Related to the "Winds Execute" Message
SRH-211 - Japanese Radio Communications and Radio Intelligence
SRH-230 - The Role of COMINT in the Battle of Midway
SRH-235 - COMINT Contributions to Submarine Warfare in WWII
SRH-251 - History of Communications in Korea, September 1950 to July 1953
SRH-254 - The Japanese Intelligence System
SRH-255 - Oral History Interview With Mr. Robert D. Ogg
SRH-260 - OP-20-G File of Memoranda, Reports and Messages on German Blockade Runners (World War II) (1943-1944)
SRH-268 - Advanced Intelligence Centers in the U.S. Navy, June 1942
SRH-269 - U.S. Army COMINT Policy: Pearl Harbor to Summer 1942
SRH-270 - Army-Navy-FBI COMINT Agreements of 1942
SRH-271 - Presidential Memorandum on Communications Intelligence Activities
SRH-295 - U.S. Naval HFDF Station, Sitka, Alaska
SRH-303 - Navy Supplementary Radio Station Otter Point, Umnak, Alaska
SRH-317 - Pacific Fleet Mobile Radio Intelligence Unit Reports: 1943
SRH-334 - Further Applications of the Principles of Indirect Symmetry of Position in Secondary Alphabets
SRH-338 - Manual of Cryptography
SRH-339 - Elements of Cryptography
SRH 342 - Cryptographic Division German Word List August 1942
SRH 343 - Cryptographic Division Spanish Word List August 1942
SRH-352 - U.S. Navy Radio Station Dutch Harbor, Unalaska, Alaska
SRH-353 - Elementary Military Cryptography War Department Technical Manual TM 11-484 March 1945
SRH-361 - History of The Signal Security Agency, Volume II: General Cryptanalytic Problems
SRH-362 - History of the Signal Security Agency, Volume III: The Japan Army Problems: Cryptanalysis 1942-1945
SRH-364 - History of the Signal Security Agency, Volume I: Organization, 1939-1945
SRH-366 - The History of Army Strip Cipher Devices (July 1934 - October 1947)
SRH-368 - Evaluation of the Role of Decryption Intelligence in the Operational Phase of the Battle of the Atlantic
SRH-377 - Order of Battle of OKW, CHI (Third Reich), 1945
SRH-378 - Radio Situation Reports, Army Group South (Third Reich), 1941
SRH-379 - The German Navy Signal Intelligence Service (Third Reich), 1944
SRH-380 - Final Report on the "Rote Kapelle" Case (Third Reich)
SRH-381 - Soviet Union Aircraft Reporting Service of the Field Forces Third Reich
SRH-382 - Effects of Russian Radio Silence on German Intelligence Third Reich 1944
SRH-383 - Russian Tactical Air Support Organization Third Reich 1945
SRH-384 - Russian Air Force Radio Traffic Third Reich
SRH-385 - Soviet Long Range Bomber Force (Third Reich)
SRH-386 - Organization and Operation of GAF Traffic Analysis and Intercept Control on the Eastern Front Third Reich
SRH-387 - Safeguarding the Radio Traffic of Signal Units Third Reich
SRH-388 - Wire Monitoring Third Reich 1944
SRH-389 - Speech Scrambler and other items (Third Reich)
SRH-390 - Communication Security Scrambler Translations Third Reich
SRH-391 - American Signal Intelligence in Northwest Africa and Western Europe
SRH-400 - Headquarters 3rd Radio Squadron Mobile (G) Unit History April 1944-June 1944
SRH-401 - Record of Accomplishments 3rd Radio Squadron Mobile 8 June To 26 October 1944
SRH-402 - 849th Signal Intelligence Service Detachment 'D'
SRH-403 - Selections from the Cryptologic Papers of RADM J.N. Wenger, USN
SRH-404 - Notes on the Liaison Service and the Liaison Intelligence Service of the German Army During the World War
SRH-406 - Pre-Pearl Harbor Japanese Naval Messages
SRH-407 - Collection of Memoranda by the Signals Security Agency Re "Winds Execute Message" September 1944
SRH-408 - Japanese Diplomatic Intelligence Espionage Net in Free China August 1945
SRH-409 - Observations on Signal Intelligence Gained From North African Theater of Operations
SRMA-001 - Polygraphic Coincidence Counter with Alphabet Mixer
SRMA-002 - Staff Study on OSS Cryptographic Plan
SRMA-003 - US Army Converter M-228 (Short Title: SIGCUM)
SRMA-004 - Policy on Classification of Cryptographic and Cryptanalytic Devices
SRMA-005 - Enemy Analysis of Allied Communications, 15 December 1944
SRMA-006 - Use of Balloons by Japanese, WWII
SRMA-007 - War Department Technical Manual Fire-Control Code
SRMA-008 - War Department, The Combat Code, Tentative Edition
SRMA-009 - Basic Cryptography Department of the Army Technical Manual
SRMA-010 - French Knowledge of German Cryptanalysis, 1927
SRMA-011 - SSS, SSA, ASA, Staff Meeting Minutes, 25 November 1942-17 February 1948
SRMA-012 - Field Codes Used By the German Army During the World War
SRMA-013 - Statistical Methods in Cryptanalysis, Kullback, 1935
SRMA-014 - Intelligence Documents; German Intelligence Activity in the Far East, Japanese Estimate of US Ground Order of Battle, Japanese Estimate of Allied Order of Battle
SRMA-015 - Surrender on the Air
SRMD-001 - Estimates of Empire Air Distribution, 5 June-14 August 1945
SRMD-002 - War Plans Section Comments on Communication Intelligence Summaries, Joint Intelligence Center Pacific Ocean Area (JICPOA), 21 June-2 December 1942
SRMD-003 - Summary of Orange Ship Traffic by Ports for December 1942
SRMD-004 - Combined Communications Board, Washington Subtractor Table for Use With the Combined Field Code Pacific and Australian Edition
SRMD-005 - United States Navy File of SIGTOT Messages From JICPOA Estimates Section to CINCPAC Advanced Headquarters, March-August 1945
SRMD-006 - United States Navy File of SIGTOT Messages CINCPAC Advanced Headquarters to JICPOA, Estimates Section, March-August 1945
SRMD-007 - JICPOA, Summary of ULTRA Traffic.
SRMD-008 - JICPOA, Analysis of Enemy Shipping, Mining and Mine Countermeasures, 15 February-17 August 1945
SRMD-009 - JICPOA, F-22 File of Administrative Letters, Correspondence, January 1942-September 1945
SRMD-010 - Joint Intelligence Center Pacific Ocean Area (JICPOA), Estimate of Enemy Distribution and Intentions
SRMD-011 - JICPOA, Estimate of Japanese Army and Navy Fighter Deployment, 8 Aug 1944-23 April 1945
SRMD-012 - JICPOA, Enemy Combat Ship Losses, 1 January 1944-1 August 1945
SRMD-013 - JICPOA, Japanese Merchant Ship Losses, December 1941-April 1944
SRMD-014 - JICPOA, Various Reports and Memoranda on Mining, April 1944-January 1945
SRMD-015 - Reports and Memoranda on a Variety of Intelligence Subjects, January 1943-August 1945
SRMD-016 - JICPOA, Weekly Location Report, (Japanese Fleet, Air Forces, Ground Forces)
SRMN-018 - Mexican Intercepted Messages 1912-1924; MI-8 Yardley File
SRMD-019 - Panay Incident
SRMD-020 - Master Load and Compare Program for SLED II
SRMF-001 - HQ XXI Bomber Command, Memoranda Concerning Enemy Reaction to U.S. Bombing Missions, 24 January-10 March 1945
SRMF-002 - Meetings Concerning AAF Radio Squadron Mobile Functions
SRMN-001 - Military Study of Facsimile, by J.N. Wegner, Lt., USN, 1938?
SRMN-002 - Convoy Routes of Japanese Merchant, Tanker and Combatant Ships in the Pacific Area, December 1, 1943-October 1944.
SRMN-003 - Instructions for Safeguarding and Using Navy Cipher Box, Mark II 1918
SRMN-004 - OP-20G, File of CINCPAC Intelligence Bulletins (16 March-1 June 1942)
SRMN-005 - OP-20-G, File of Memoranda and Reports Relating to the Battle of Midway
SRMN-006 - Royal Australian Navy Support to United States Navy through Australian Commonwealth Naval Board Summaries, Translations of Japanese Messages, February-December 1942
SRMN-007 - Japanese Espionage Activities in the United States, 1941-1943
SRMN-008 - United States Navy, CINCPAC and COMFOURTEEN, CI Bulletins, Radio Digests, 1 March-31 December 1942
SRMN-009 - United States Navy, CINCPAC Fleet Intelligence Summaries, 22 June 1942-8 May 1943
SRMN-010 - United States Navy, Course in Elementary Cryptanalysis, 1941-1942
SRMN-011 - United States Navy, Elementary Course in Cryptanalysis, 1948-1950
SRMN-012 - Combat Intelligence Unit, 14th Naval District, Traffic Intelligence Summaries with Comments by CINCPAC War Plans, Fleet Intelligence Sections, 16 July 1941-30 June 1942.
SRMN-013 - United States Navy Commander in Chief, Pacific Intelligence Bulletins #78-#666, 1 June 1942-28 September 1945, Vols. 1-10
SRMN-014 - United States Navy, FRUPAC "GI Manual", 3 February 1944
SRMN-015 - United States Navy, The Establishment of Advanced Intelligence Centers, May 1942-August 1943
SRMN-016 - U.S. Navy, COMINCH (F-22), File of Intelligence and Liaison, Pacific Area (BESAW), 10 September 1943-21 November 1945
SRMN-017 - U.S. Navy, CINCPAC, CINCPOA, Japanese Repatriation Ship Movements
SRMN-018 - U.S. Navy, (OP-20-G), West Coast Communications Intelligence Activities, Policies and Procedures, 20 June 1942-26 December 1943
SRMN-019 - U.S. Navy, (CINCPAC, CINCPOA), Estimate of Enemy Situation, 30 June 1944-27 August 1945
SRMN-020 - U.S. Navy, (CINCPAC, CINCPOA), Estimate of Enemy Strength in the Carolines-Marianas and Adjacent Areas, 20 March-31 July 1944
SRMN-021 - U.S. Navy, (CINCPAC, CINCPOA), Estimate of Enemy Strength in the Marshalls, Gilberts and Adjacent Areas, 6 September-27 December 1943
SRMN-022 - U.S. Navy, (COMINCH, F-21), Log of Attacks on U-Boats, 6 November 1942-30 December 1943
SRMN-022A - U.S. Navy, (COMINCH, F-21), Log of Attacks on U-Boats, 1 January 1944-5 May 1945
SRMN-023 - U.S. Navy, (COMINCH, F-21), Log of U-Boat Attacks
SRMN-024 - U.S. Navy, CINCPAC, CINCPOA), Enemy Reaction to Nansei Shoto and Formosa Air Strikes, (Special Report), 20 October 1944
SRMN-025 - U.S. Navy, (CINCPAC, CINCPOA), Post War Summaries of Status of Japanese Naval Vessels (Sunk and Afloat), November 1945
SRMN-026 - U.S. Navy, (CINCPAC, CINCPOA), Estimate of Empire Approaches and Combat Air Strength, 20 December 1944
SRMN-027 - U.S. Navy, Estimated Disposition of Japanese Fleet, Aircraft Merchant\Shipping and Economic Notes, 2 December 1944-3 August 1945
SRMN-028 - U.S. Navy, Reports of the West Coast HF, DF Strategical Net.
SRMN-029 - U.S. Navy, Daily Radio Intelligence Summaries Net Control, West Coast R.I. Net, 22 August-1 September 1943
SRMN-030 - COMINCH File of Biweekly Messages on U-Boat Trends, 1 September 1942-1 May 1945
SRMN-031 - COMINCH Messages on German U-Boat Position Estimates, 10 June 1942-6 November 1942
SRMN-032 - COMINCH File of Memoranda Concerning U-Boat Tracking Room Operations, 2 January 1943-6 June 1945
SRMN-033 - COMINCH File of Messages on U-Boat Estimates and Situation Reports, 1 October 1941-4 June 1945
SRMN-034 - COMINCH File: Rough Notes on Daily U-Boat Positions and Activities, January 1943-May 1945
SRMN-035 - Admiralty-COMINCH, Ultra Message Exchange, 25 June 1942-17 October 1944
SRMN-036 - COMINCH File of U-Boat Situation Estimates, 15 June 1942-21 May 1945
SRMN-037 - COMINCH File: U-Boat Intelligence Summaries, January 1943-May 1945
SRMN-038 - Functions of the "Secret Room" (F-211) of COMINCH Combat Intelligence Atlantic Section, Anti-Submarine Warfare, WWII
SRMN-039 - COMINCH Pacific Strategic Intelligence Section (PSIS) File, March 1944-December 1945
SRMN-040 - COMINCH File: Assessment of U-Boat Fleet at the End of WWII, June-October 1945
SRMN-041 - COMINCH File: Liquidated U-Boats, 1942-1945
SRMN-042 - COMINCH File: Anti-submarine Warfare Actions Against Japanese Submarines, 12 September 1944-25 October 1945
SRMN-043 - COMINCH File: Special U-Boat Invasion Summaries, 6 June 1944-18 June 1944
SRMN-044 - COMINCH File: Weekly Report on Estimated Locations of Japanese Fleet Units, 1 September 1942-9 August 1945
SRMN-045 - COMINCH File: Estimates of Japanese Air Strength 5 Jan 42-31 Dec 45
SRMN-046 - COMINCH File: Messages Dealing With the U-Boat Problem, 4 June 19942-16 May 1945
SRMN-047 - COMINCH Chart: German Naval Radio Stations and Established Communication Lines, 1 January 1945
SRMN-048 - OP-20-GI, Reports on U-Boat Disposition and Status, December 1942-2 May 1945
SRMN-049 - COMINCH File: Ultra Assessments by F-22 "Secret Room", of Attacks on U-Boats, July 1943-July 1944
SRMN-050 - OP-20-GI, Japanese COMINT Reports as Noted by U.S. Navy Intercept, 21 January-6 June 1944
SRMN-051 - OP-20-GI, Memoranda to COMINCH F-35, on German U-Boat Activities, December 1942-September 1943
SRMN-051A - OP-20-GI, Memoranda to COMINCH F21, on German U-Boat Activities, October 1943-May 1945
SRMN-052 - OP-20-GI, Reports on Japanese, German Radar and Electronics, July 1943-March 1945
SRMN-053 - OP-20-GI, Reports on German U-Boats East of Capetown, July 1944-May 1945
SRMN-054 - OP-20-GI Special Studies Relating to U-Boat Activity, 1943-1945
SRMN-055 - OP-20-GI-A, Forecast, Statistics of U-Boat Activities, 26 January-11 July 1944
SRMN-056 - Listing of Ship Sinkings Attributed to German U-Boat Successes January 1941-April 1945
SRMN-063 - HCM (Hebern Cipher Machine) Cipher No. 21
SRMN-075 - Instructions for Preparing Flat Strip Alphabets For Use
SRMN-076 - Strip Cipher No. 69 RIP-58
SRMN-084 - The Evolution of the Navy's Cryptologic Organization
SRNS-0001-0078 - CNO Summaries (of Radio Intelligence), Japanese Naval Activities (14 April 1942-30 June 1942)
SRNS-0079-0170 - CNO Summaries (of Radio Intelligence), Japanese Naval Activities (1 July 1942-30 September 1942)
SRNS-0171-0262 - CNO Summaries (of Radio Intelligence), Japanese Naval Activities (1 October 1942-31 December 1942)
SRNS-0263-0352 - CNO Summaries (of Radio Intelligence), Japanese Naval Activities (1 January 1943-31 March 1943)
SRNS-0353-0443 - CNO Summaries (of Radio Intelligence), Japanese Naval Activities (1 April 1943-30 June 1943)
SRNS-0444-0535 - CNO Summaries of Radio Intelligence, Japanese Naval Activities (1 July 1943-30 September 1943)
SRNS-0536-0627 - CNO Summaries of Radio Intelligence, Japanese Naval Activities (1 October 1943-31 December 1943)
SRNS-0628-0718 - CNO Summaries of Radio Intelligence, Japanese Naval Activities (January 1944-31 March 1944)
SRNS-0719-0809 - CNO Summaries of Radio Intelligence, Japanese Naval Activities (1 April 1944-30 June 1944)
SRNS-0810-0901 - CNO Summaries of Radio Intelligence, Japanese Naval Activities (1 July 1944-30 September 1944)
SRNS-0902-0993 - CNO Summaries of Radio Intelligence, Japanese Naval Activities (1 October 1944-31 December 1944)
SRNS-0994-1083 - CNO Summaries of Radio Intelligence, Japanese Naval Activities, 1 January 1945-31 March 1945
SRNS-1084-1174 - CNO Summaries of Radio Intelligence, Japanese Naval Activities, 1 April 1945-30 June 1945
SRNS-1175-1289 - CNO Summaries of Radio Intelligence, Japanese Naval Activities, 1 July 1945-23 February 1946
SRNS-1517 - Fleet Radio Unit Melbourne (7th Fleet), Daily Digests
SRNS-1518 - Fleet Radio Unit Melbourne (7th Fleet), Outgoing, Incoming Messages.