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# Friedman Documents

HomeHelpful LinksNSA FOIADeclassification & Transparency InitiativesHistorical ReleasesFriedman-DocumentsReports-Research

## Reports and Research Notes

   (Folder ID: ACC27475) Report on an Investigation of System Indicator Encipherment with Review and Comment by Friedman, 1945 

   (Folder ID: ACC32526) Reproduced Copy of the American Black Chamber by Herbert O. Yardley, with Handwritten Comments by Friedman, 1931-1939 

   (Folder ID: ACC37006) Cryptographic Codes and Ciphers: Spanish Convenience Code Book "Y", 1932 

   (Folder ID: ACC4127) Memoranda and Reports, Resume of Work of the Code and Cipher Section, Annual Report of the Director of Communications Research, Evaluation Studies, 1921-1946 

Folder ID: (ACC50342) - Folder not releasable

   (Folder ID: ACC50346) Paper Written by Friedman on Cryptographic Equipment for Either Single-Originator or Multi-Originator Communication, 1944-1947 

   (Folder ID: ACC8971) Thesis Paper by Friedman Regarding an Examination Into the Duties of the Officer-In-Charge of the Signal Intelligence Service, 1934 

   (Folder ID: FOLDER 006) Photographs, Berkeley Street Building, Friedman, Beaumanor Station, Alistair G. Denniston, Professor E.R. Vincent, Brigadier John H. Tiltman, 1940-1950 

Folder ID: (FOLDER 007) - Folder not releasable

   (Folder ID: FOLDER 039) Memorandum Regarding Signal Intercept Equipment, 1954 

   (Folder ID: FOLDER 040) Changes Inside the Pentagon, Reprinted from the Harvard Business Review, 1954 

   (Folder ID: FOLDER 041) GS 12-GS 18 Seniority List, 1955 

   (Folder ID: FOLDER 042) GS 12-GS 18 Seniority List, 1954 

   (Folder ID: FOLDER 043) British Government Code and Cypher School Loyalty Declaration Made by Personnel Loyalty/Non-Disclosure Oath), 1941 

   (Folder ID: FOLDER 044) Director of Naval Intelligence Memorandum Related to Security Leaks and Newspaper Clippings Related to William and Elizebeth Friedman Cryptanalytic Work, 1934-1941 

   (Folder ID: FOLDER 045) Memoranda, Policies, and Reports, Information Security Issues, 1942-1955 (2 Folders) 

   (Folder ID: FOLDER 046) Categories of NSA Specialties, 1954 

   (Folder ID: FOLDER 047) Radio Laws of the US, 1972; Communications Act of 1934 

   (Folder ID: FOLDER 048) National Security Agency, Study of the Security Division, 15 February 1955 

   (Folder ID: FOLDER 049) Report from the Technical Management Board Working Group for Project No. 20, Military Cryptologic Career Plan, 31 January 1955 

   (Folder ID: FOLDER 050) Federal Laws and Armed Forces Security Agency Memoranda, 1945-1952 

   (Folder ID: FOLDER 051) Report of Review of National Security Agency Security Procedures and Status Background Information, 1962 

   (Folder ID: FOLDER 052) Newspaper Clippings, Copies of the Congressional Record and Criminal Code, NSA Security Oath and Oath of Secrecy, and Other Documents Related to the Legislative History of Section 798 US Code Title 18 (Public Law 513), 1942-1946 

   (Folder ID: FOLDER 053) History of the US Naval Code and Signal Laboratory, 12 August 1950 

   (Folder ID: FOLDER 055) Informal Notes and Draft Report on Laws Concerning US Cryptologic Activities, 1933-1959 

   (Folder ID: FOLDER 057) Research Notes, Reports, Newspaper Clippings, Related to Proposed Amendments to Espionage Acts, 1930-1949 (2 Folders) 

   (Folder ID: FOLDER 058) NSA Europe Briefing on Reports, 1955; Lecture Papers, 1944-1955; Correspondence Related to Cryptosystem Proposal by Howard N. Smith, 1955 

   (Folder ID: FOLDER 059) NSA Bulletins, Operations Orders, Regulations, and Correspondence Related to Training, 1952-1955 

   (Folder ID: FOLDER 060) Correspondence, Memoranda, Reports, Analysis of Foreign Codes and Cipher Systems, US Cryptanalytic Accomplishments During World War I and World War II, 1917-1955 

   (Folder ID: FOLDER 061) National Security Act, 1947 (Amended) 

   (Folder ID: FOLDER 062) Correspondences Between the Honorable John F. Sonnett and Under Secretary of War and the Judge Advocate General About the Department of Justice Patent Policy Survey, 1945-1947 

   (Folder ID: FOLDER 063) Correspondence, Navy Regulations and Commercial Firms, 1945-1949 

   (Folder ID: FOLDER 064) Armed Forces Security Agency (AFSA) Report to the Joint Chiefs of Staff, Selection of A Site for the Proposed Cryptologic Establishment Outside the Washington Area (JCS 2010/32, 9 March 1951), and Documents Related to the Relationship Between AFSA and the Services, 1950-1955 

   (Folder ID: FOLDER 065) Correspondence, Memoranda, Agendas, Working Papers, Reports, Subjects Include: Technical Cryptanalytic Texts and Courses, Technical Support Group, Budgets and Relationships with Military Services, Cryptologic Equipment, Historical Background of Traffic Analysis and Communication Intelligence, Information Concerning Dr. Hans Rohrbach, Military Communications Objectives, 1946-1955 (2 Folders) 

   (Folder ID: FOLDER 077) Memorandum and Preliminary Historical Report on the Solution of the "B" Machine, 1940-1945 

   (Folder ID: FOLDER 090) Correspondence, Memoranda, Working Notes, Diagrams, Dr. Grimsen, and Hagelin Laboratories, 1954-1957 

   (Folder ID: FOLDER 091) Mission and Functions Statements, NSA Europe, 1952 

   (Folder ID: FOLDER 093) Preliminary Historical Report on the Solution of the "B" Machine, S-2403 (Solution and Red B Machines 1940) 

   (Folder ID: FOLDER 106) Brief Descriptions of Cryptanalytic Machines Built by the Army and Navy In the 1940s and 1950s, Fourth Installment, 1954 

   (Folder ID: FOLDER 107) Brief Descriptions of Cryptanalytic Machines Built by the Army and Navy In the 1940s and 1950s That Were In NSA (Including Photographs), First and Second Installment 1953-1954 (2 Folders) 

   (Folder ID: FOLDER 109) Memoranda and Reports, Hagelin Communications Security (COMSEC) Equipment, 1951-1955 

   (Folder ID: FOLDER 110) Research Notes and Narrative History, Boris Hagelin Senior, 1958 

   (Folder ID: FOLDER 112) Memoranda, Policies, Cafeteria Mess and Messing Systems, 1949-1951 

   (Folder ID: FOLDER 113) Report, Memorandum, and Newspaper Clippings Regarding Machine Identification of Words, 1955 

   (Folder ID: FOLDER 124) Armed Forces Security Agency (AFSA) Historical Study, the Colmar Compromise, 1952 

   (Folder ID: FOLDER 125) Signal Corps Laboratories Annual Report for Fiscal Year 1937 on Mechanical and Electrical Cipher Machines, Apparatus Electrical and Mechanical for Breaking Codes and Ciphers M134, 1937 

   (Folder ID: FOLDER 134) Newspaper Clippings, Early Warning Press Articles, 1953-1954 

   (Folder ID: FOLDER 135) Air Defense Command (Adc), Memorandum and Related Papers Pertaining to an Air Defense Command Proposal for Improved Warning, USSR Attack Planning Plan: One Phase In the Methodology for Determining the Imminence of an Air Attack on the United States, 1953 

   (Folder ID: FOLDER 136) Early Warning-Special National Intelligence Estimate (SNIE), 1954 

   (Folder ID: FOLDER 138) Report on the Potentialities of Communications Intelligence (COMINT) AS A Source of Warning of the Imminence of Hostilities, 1953 

   (Folder ID: FOLDER 139) Reports and Memoranda, the Potentialities of Communications Intelligence (COMINT) for Strategic Warning, 1953-1954 

   (Folder ID: FOLDER 141) Joint Secretariat Memo No. 96, Instructions for Preparation of Reports for the Joint Chiefs of Staff, 1959 

   (Folder ID: FOLDER 142) Open Source Yardley Articles, 1931 

   (Folder ID: FOLDER 147) Correspondence Related to Government Code and Cipher School (GC&CS) Army and Air Force Signals Intelligence (SIGINT) History, 1953-1954 

   (Folder ID: FOLDER 149) Newspaper Clippings-Also Has Classified Memoranda Concerning the United States Communications Intelligence Board (USCIB), Communications Intelligence (COMINT) Clearance Standards and Procedures, Polygraph Information, Clearance of Special Cryptologic Math Panel (SCAMP) Personnel, Organizations Having A Conflict of Interest with the US and Homosexuals and Government Employment (1950-1959) 

   (Folder ID: FOLDER 154) Briefing, Machines In the Service of Cryptanalysis, 1954; Edpm Type 701, Abner, Atlas I, Sled I, Skate II, and Demon II Photographs, 1954 

   (Folder ID: FOLDER 157) Lecture by A.B. Clark, Deputy Director R/D, 1955 

   (Folder ID: FOLDER 159) Lecture on Field Operations by Mr. Herzog, Chief Field Operations Direction Group, 1954, Including Photographs 

   (Folder ID: FOLDER 160) Lecture to the Naval War College by Capt J.N. Wenger, 1959 

   (Folder ID: FOLDER 180) Background Papers on Mechanization In Support of Communications Intelligence (COMINT), 1954 

   (Folder ID: FOLDER 181) Mechanization In Support of Communications Intelligence (COMINT)-Phase I, II, III, 1954-1955 

Folder ID: (FOLDER 182) - Folder not releasable

   (Folder ID: FOLDER 183) Study of Joint Organizations for the Production of Communications Intelligence and for Security of US Military Communications Part B Communications Security, 27 December 1948 

   (Folder ID: FOLDER 184) Communications Intelligence (COMINT)-Hard Facts In the Cold War by J/A/Meyer, 1958, and Correspondence Related to Publications, 1958 

   (Folder ID: FOLDER 185) Monthly Loss of Shipping by U-Boats Paper by Lcdr P.J. Karl, 1953 

   (Folder ID: FOLDER 186) Operation Evaluation Group Report #68, Evaluation of the Role of Decryption Intelligence In the Operational Phase of the Battle of the Atlantic, 1952 

   (Folder ID: FOLDER 188) Japanese Version of the Black Chamber (the Story of the Naval Secret Chamber), 1955 

   (Folder ID: FOLDER 189) Report, Status of Certain Systems (Including All Systems Current on 31 December 1954 and All Such Systems Under Study Any Time During the Calendar Year 1954), 1955 

Folder ID: (FOLDER 191) - Folder not releasable

   (Folder ID: FOLDER 192) Memorandum to the National Security Council, Minimum Standards for the Handling and Transmission of Classified Information; Armed Forces Security Agency Memorandum, Security of Equipment Used for Storage of Classified Material, 1949-1951 

   (Folder ID: FOLDER 193) Gee Narrative Account of A Broken One-Time Pad System, 1954 

   (Folder ID: FOLDER 194) US Air Intelligence Estimate, Aie-1, Threat of Action from Communist Air Forces to the Continental Strengths of North America, Directorate of Intelligence Headquarters United States Air Force, 1 October 1952 

Folder ID: (FOLDER 196) - Folder not releasable

   (Folder ID: FOLDER 197) Compilations of Cipher Telegrams Related to the Zimmerman Telegram with Notes, 1917 

   (Folder ID: FOLDER 200) War History Reports Inventory, 1950; Investigations of the National War Effort Report Committee on Military Affairs House of Representatives, 17 December 1946 

   (Folder ID: FOLDER 201) Extract from RIP 98, Appendix II (Pgs. 375-419)-American Measures Against Communication Intelligence Publicity, 5 April 1943 

   (Folder ID: FOLDER 207) Defector Reports and Newspaper Clippings (Petrov), 1954-1955 

   (Folder ID: FOLDER 208) Dr. Turkey Memorandum from J.S. Holtwick, Jr. Captain, US Navy, Deputy Chief of Staff Operations Related to A Report Made by the Land Subcommittee of Dr. Killian's Scientific Advisory Council to the President, 1955 

   (Folder ID: FOLDER 209) US Air Force Project Rand Research Memorandum-Is There A Defense by Bernard Brodie, 1956 

   (Folder ID: FOLDER 211) Preliminary Historical Report on the Solution of the "B" Machine (the "Purple" System), by William Friedman, 1940 

   (Folder ID: FOLDER 212) A Version of the Japanese Problem In the Signal Intelligence Service (Later Signal Security Agency), 1930-1945, by John B. Hurt, 1956 

   (Folder ID: FOLDER 215) AR-380-5 Safeguarding Military Information, Draft with Revision Comments, 1948-1949 

   (Folder ID: FOLDER 216) Memoranda and Newspaper Clippings Related to Vladivostok Incident and Radar-Electronic Intelligence, 1954 

   (Folder ID: FOLDER 217) A Method of Ciphering by Howard N. Smith and Howard W. Lewis, 1954 

   (Folder ID: FOLDER 223) Appendix 4, Service Terminology and Stereotypes, 1935 

   (Folder ID: FOLDER 224) Brief History of the Signal Intelligence Service, First Draft with W. Preston Corderman Edits, 1943 

   (Folder ID: FOLDER 261) Memoranda, Analytical Machine Employment, 1951-1952; Trip Report, IBM Customer Education Class, 1952; Critique and Proposal for Administration of Agency Automatic Sequenced Digital Computer Equipment Including A Table of Organization for A Digital Computer Division, September 1952; Planning for Atlas II, 1952 

   (Folder ID: FOLDER 262) Memoranda, Final Briefing, and Draft Briefing Notes for General Canine and the Joint Chiefs of Staff Regarding the Replacement of the Combined Cipher Machine, 1952-1953; Transcript of Office of Communication Security Conference on Replacement of the Combined Cipher Machine of Which Friedman Was In Attendance, 1952 

   (Folder ID: FOLDER 264) Target Intelligence Committee (TICOM) Note 36, Russian Sources of Information, August 1954; War Secrets In the Ether Parts I and II by Wilhelm F. Flicke Translated by Ray W. Pettengill, 1953 

   (Folder ID: FOLDER 266) Army Security Agency (ASA) Review-the War In the Ether-Cryptosecurity at Brest-Litovsk (Translated from Original German Materials by Dr. Ray W. Pettengill), 1951; the Tannenberg Story, 1952; Tannenberg: Finale and Discussion, 1952; Fixing the Positions of Agent Radio Stations, 1952; the Second Half of the War In the East, 1952; Polyps and Penkalas, 1952; the Rote Kapelle Case: Denouement and Exploitation of Successes, 1952; the Russian Radio Agent Service In 1942, 1951; and Preparations for the Polish War, 1951 

   (Folder ID: FOLDER 354) A Brief History of Consolidated Special Information Dissemination Office (CONSIDO), by William Friedman, February 1952 

   (Folder ID: FOLDER 355) Memoranda, Government Communications Headquarters (GCHQ) Structure and Organization, 1950-1952 

   (Folder ID: FOLDER 356) Policies and Working Notes, Relating to Consolidated Special Information Dissemination Office (CONSIDO), 1945-1954 

   (Folder ID: FOLDER 357) General Orders, Reorganization of Communications Security (1954); the National Communications Security Material Program (Current Equipments and Mid-Range Development and Current Cryptomaterial Production), September 1954; National Security Agency, Office of Communication Security Manual Organization and Functions, January 1954-Includes Organizational Charts 

   (Folder ID: FOLDER 362) Terms of Reference, Memoranda Related to US Security Authority for NATO Affairs and Report by the Military Representatives Committee to the North Atlantic Defense Committee on Proposed Revision of the North Atlantic Treaty Organization Security System (Including an Oversized Diagram), 1950-1953 

   (Folder ID: FOLDER 363) Correspondence and Report on the Research Organization of the Armed Forces Security Agency by Engstrom, 1952-1954 

   (Folder ID: FOLDER 369) Memoranda and Reports, Cryptologic Technical Intelligence of Foreign Nations, Including Procurement of Cryptologic Information, Value of Target Intelligence Committee (TICOM) Documents In Western Area Sections, Communications Intelligence Capabilities of Certain Governments, Soviet Sophistication In Communications Security and Communications Intelligence, and History of Collaboration Among Cryptologic Agencies Between 1909-1939, 1951-1952 

   (Folder ID: FOLDER 370) Memorandum on NSA-CIA Liaison and Interchange of Information, 1953; Outline for Cryptologic Studies, Locations and Types of Cryptologic Intelligence Files with Certain Individuals, 1953 

   (Folder ID: FOLDER 374) US and UK Policies and Practices In the Dissemination of Communications Intelligence (COMINT) During World War II, 1951 (Also Includes A Report on the Contribution of Signal Intelligence Toward Victory In World War II and Its Relatively Small Cost) 

   (Folder ID: FOLDER 375) Identification Friend or Foe (IFF) Proposal with Facilities for Secure Data Transmission by Carey C. Tison, 30 March 1955 

   (Folder ID: FOLDER 376) Policies, Directives, and Memoranda Relating to Physical Security, 1951-1955 

   (Folder ID: FOLDER 377) Memoranda, Newspaper Clippings, Reports, Relating to Security Violations and Leaks of Classified Information, 1948-1954 

   (Folder ID: FOLDER 378) Clearance File of Civilian Experts In Some Activity of Interest to the National Security Agency, A-K, 1953-1954 

   (Folder ID: FOLDER 379) Clearance File of Civilian Experts In Some Activity of Interest to the National Security Agency, L-Z, 1952-1954 

   (Folder ID: FOLDER 381) Security on Armed Forces Security Agency (AFSA) Communications Intelligence (COMINT) Classification and Report of Communications Security Violations, 1951-1955 

   (Folder ID: FOLDER 382) Memoranda, Reports, Directives, and Policies, Measures to Increase Communications Intelligence (COMINT) Security, 1950-1954 

   (Folder ID: FOLDER 386) Memorandum on Decentralization of the National Communications Intelligence (COMINT) Effort, and NSA Field Processing Decentralization Plan, 1955 

   (Folder ID: FOLDER 387) Report on Armed Forces Security Agency (AFSA) In Regard to Organization, Methods, and Arrangements for Processing Plain-Text Traffic for the Production of Communications Intelligence (COMINT) and A Few Comments Thereon by William Friedman, 31 March 1952 (Includes Organizational Charts of AFSA AS Well AS A Report on the Necessity of Plain Text In Cryptanalysis, 28 February 1952), 1952 

   (Folder ID: FOLDER 388) Working Notes, Memoranda, and Drafts, Related to the Development of NSA Regulation 10-30-on Consultants, Experts, and Advisors, 1954 

Folder ID: (FOLDER 391) - Folder not releasable

   (Folder ID: FOLDER 394) Mechanical Translation Project Including Study on Proposals for the Mechanical Resolution of German Syntax Patterns, 1951 

   (Folder ID: FOLDER 395) Report on Cryptologic Organization by E. Maxine Devore (3 April 1952) and Related Memoranda and Correspondence, 1950-1952 

   (Folder ID: FOLDER 403) Intercepted Message, Communications Security (COMSEC), 1952 

   (Folder ID: FOLDER 404) Memoranda, Reports, Working Notes on Communications Security, 1952-1953 

   (Folder ID: FOLDER 405) Memoranda and Correspondence Related to Non-Communications Security Surveillance Activities and Support of Communications Intelligence Activities, 1952 

   (Folder ID: FOLDER 406) NSA Regulations and Check List for A War and Disaster Plan, Including the Armed Forces Security Agency Disaster Plan (AFSADIS), 9 September 1952, 1951-1954 

   (Folder ID: FOLDER 407) Memoranda Regarding Preparation and Format of NSA's Long-Range Estimate and Requirements Planning, 1954 

   (Folder ID: FOLDER 408) Draft Proposed Regulation for A New Executive Control Conference, 1954 

   (Folder ID: FOLDER 409) Report, Communications Security and Review of Cryptography, 1955 

   (Folder ID: FOLDER 427) Report, National Mid-Range Communications Security (COMSEC) Program, by NSA, March 1954 

   (Folder ID: FOLDER 433) Can Cryptologic History Repeat Itself?: Being A Personal Account of A Cryptanalytic Challenge Which Was Successfully Met Before the Dawn of the Machine Age, by William F. Friedman, 21 July 1948 

   (Folder ID: FOLDER 441) Correspondence Related to Training Foreign Nationals In Use of Converter M-209, and Related Cryptographic Devices, and Report by the Research and Development Advisory Council to Director, National Security Agency Related to Murdock, 1954-1955 

   (Folder ID: FOLDER 442) Zebab Problem from the Course In the Cryptanalysis of Machine Ciphers "ZE" Series, 1952 

   (Folder ID: FOLDER 447) Report, Proposed Range of Gasoline Engine-Electric Power Units for Post War Development, Signals Research and Development Establishment, 1946 

   (Folder ID: FOLDER 448) Report by the Research and Development Advisory Council to Director, National Security Agency on Liza, 1955 

   (Folder ID: FOLDER 449) Report and Photographs, Ottico Meccanica Italiana Criptograph-Wiring, 1954 

   (Folder ID: FOLDER 450) Memoranda, Correspondence, and Research Notes on A Request for Japanese Target Intelligence Committee (TICOM) Data, the Army Security Agency's Results of Axis Analysis of United States Communications AS Revealed by TICOM and Other Sources of Intelligence-Volume C German Traffic Analysis of United States Communications (16 August 1946), an Extract from History of H.M.S. Anderson Investigation of National War Effort, Investigations of the National War Effort Report Committee on Military Affairs House of Representatives (1946), 1946-1955 

   (Folder ID: FOLDER 454) Potential Function of Placename Indices In the Intelligence Division by Thomas A Miller, 27 September 1945 

   (Folder ID: FOLDER 461) Working Papers, Drafts, Memoranda, Intercepted Messages Related to Various Communications Security Issues; Includes Magic-Far East Summaries on Japanese Intelligence and Magic Diplomatic Summaries, Japanese Compromise of Vichy Code, and the Relationship of Japanese Traffic Analysis (T/A) to the Security Problem (1945), 1944-1945 

   (Folder ID: FOLDER 462) Combined Services Detailed Interrogation Center (Csdic) Reports, Including Interrogation Reports of Italian and German Intelligence Officers, Military Personnel, and Police, 1944-1945 

   (Folder ID: FOLDER 467) Memoranda, Organizational Charts, Drafts and Final Reports, Related to Collaboration Between Army and Navy Cryptologic Agencies and the State Department (Including an Investigation Into the Security of the State Departments Communications and Use of Cryptographic Equipment), 1934-1946 

   (Folder ID: FOLDER 469) Report, Loss of Registered Cryptographic Documents to the Commanding General, United States Forces, India-Burma Theater, 23 May 1946, 1946-1948 

   (Folder ID: FOLDER 475) Correspondence Related to the Proposed Purchase of Manuscripts Written by Colonel Andreas Figl, Formerly Chief Cryptographer of the Austro-Hungarian Army, 1949 

   (Folder ID: FOLDER 477) Study Involving Multiple Stepping, 1947 

   (Folder ID: FOLDER 479) Correspondence with the Acme Code Company Regarding the Acme Commodity and Phrase Code, 1947 

   (Folder ID: FOLDER 480) Messages, Activity Reports, Related to Traffic Analysis and Other Activities, 1944-1949 

   (Folder ID: FOLDER 481) Memorandum, Summary of Activities of "A" Branch for 16 January-31 January 1945 Inclusive, 1944-1945 

   (Folder ID: FOLDER 488) Control Analysis Study Into the General Cryptanalytic Problem (I.E., the Production of Intelligence from Foreign Communications Other Than Those of the Japanese Army), 1945 

   (Folder ID: FOLDER 489) Background Notes and Research Related to the Control Analysis Study Into the General Cryptanalytic Problem (I.E., the Production of Intelligence from Foreign Communications Other Than Those of the Japanese Army), Including Large Work Flow Diagrams and Production Analysis Worksheets, 1944-1945 

   (Folder ID: FOLDER 499) British Assessment Report, Ardennes Battles, 1945 

   (Folder ID: FOLDER 502) Color Photograph, Indicators Chart, 1953 (War Department General Staff-Wdgs-Oversize Material from Folder 065), 1953 

   (Folder ID: FOLDER 506) Biographical Histories of William F. Friedman Written by Lambros D. Callimahos, 1972 and 1974 

   (Folder ID: FOLDER 512) Friedman Analysis and Comments on the Superflex System, 1946-1954 

   (Folder ID: FOLDER 513) Memoranda and Reports Supplied to the Brownell Committee by Friedman, 1944-1954 

   (Folder ID: FOLDER 516) Memorandum for Theoretical Security of the Schlusselkasten, 1949 

   (Folder ID: FOLDER 517) List of Countries Which Have Purchased Machines, 1951 

   (Folder ID: FOLDER 523) Memoranda to Army Security Agency (ASA) Review Editor Regarding Nicholas Breton's Court and Country, 1950 

   (Folder ID: FOLDER 524) Translation of Article on Egyptian Cryptography Written by Canon Etienne Driton, 1950 

   (Folder ID: FOLDER 525) Notes on Codewords Article by Friedman and Mendelsohn, 1932 

   (Folder ID: FOLDER 526) Le Logogriphe D'euler by Pierre Speziali from Stultifera Navis, Bulletin DE LA Societe Suisse Des Bibliophiles, No. 1/2, 1953 

   (Folder ID: FOLDER 528) Friedman's History of Signals Intelligence Services, 1919-1943 

   (Folder ID: FOLDER 531) US Naval Communications Intelligence Organizational Structure, 1935-1949 

   (Folder ID: FOLDER 532) Cipher Security Tests for War and State Departments, 1931-1932 

   (Folder ID: FOLDER 533) Security of Axis Military Communications, 1943-1950 

   (Folder ID: FOLDER 534) Security of Allied Ciphers, 1944-1945 

   (Folder ID: FOLDER 535) Friedman Codes and Ciphers Encyclopedia Britannica Article, 1956 

   (Folder ID: FOLDER 541) Foreign Cryptographic Potentials Research File, 1941-1945 

   (Folder ID: FOLDER 547) Can Cryptologic History Repeat Itself? Being A Personal Account of A Cryptanalytic Challenge Which Involved A System and Which Was Successfully Met Before the Dawn of the Machine Age, by William F. Friedman, 21 July 1948 

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