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# Friedman Documents

HomeHelpful LinksNSA FOIADeclassification & Transparency InitiativesHistorical ReleasesFriedman-DocumentsPublications

## Publications

   (Folder ID: ACC15281) Publication, the Friedman Lectures on Cryptology by William F. Friedman, 1965. 

   (Folder ID: ACC21609) National Security Agency, Office of Training Services, Codes and Ciphers (Cryptology) by William F. Friedman, 1961 

   (Folder ID: ACC35225) William Friedman's Copy of John C. Hartfield "Lisbonian" Selection of Roots and Terminals, Containing 21,323 Five Letter Words Equal to 454,670,329 Ten Letter Words, of A Clear, Euphonious and Pronounceable Character. with at Least 2 Letters Difference Between Each Group of 5 Letters, and Telegraphically Dissimilar by European and American Morse. Each Syllable of Which Is In Current Use and Can Be Verified by Dictionaries and the Official Vocabulary. In Strict Accordance with the Decision of the Lisbon Telegraph Conference, 1908, Governing the Use of Artificial Words. Compiled by John Charles Hartfield, 1911. 

   (Folder ID: ACC35288) Book Foreword "Weitzenbock, Dr. Roland Invariantentheorie, P. Noordhoff, 1923, Groningen" with Comment by Friedman, 1954 

   (Folder ID: ACC4402) Report on German Military Ciphers with Corrections from William F. Friedman, 1918 

   (Folder ID: ACC47587) Training Course Material from Col. Tiltman to Friedman, Signals Intelligence Course Volume I: Explanatory Text and Short Exercises, Volume II: Solutions. Includes Computer Tabulated Figures for the Exercises and Three Cardboard Discs for Encoding and Decoding the Course Material, 1942 

   (Folder ID: ACC50341) Friedman's Copies of Army Regulations, Classification Marking and Safeguarding Military Information (AR-70, 330-5, 105-5, 105-25), 1922-1946 

   (Folder ID: FOLDER 012) War Department Office of the Chief Signal Officer, Washington. Final Report of the Radio Intelligence Section, General Staff General Headquarters American Expeditionary Forces, Register No. 181, Technical Paper of the Signal Intelligence Section War Plans & Training Division, 1935 

   (Folder ID: FOLDER 075) War Department Technical Manual (Tm) 11-380 Converter M-209, M-209-A, M-209-B Cipher 17 March 1944 

   (Folder ID: FOLDER 205) Articles on Cryptography and Cryptanalysis Reprinted from the Signal Corps Bulletin, War Department of the Chief Signal Officer of the United States, 1942 

   (Folder ID: FOLDER 206) the Signal Corps Bulletin No. 97, the War Department, Office of the Chief Signal Officer of the United States, July-Sept 1937 

   (Folder ID: FOLDER 213) the Contribution of the Cryptographic Bureaus In the World War, War Department, Office of the Chief Signal Officer, Reprinted from Signal Corps Bulletin Nos. 75-81, 1935 

   (Folder ID: FOLDER 214) Technical Paper of the Signal Intelligence Section War Plans and Training Division, Notes on the Liaison Service and the Liaison Intelligence Service of the German Army During the World War, War Department, Office of the Chief Signal Officer, 1935 

   (Folder ID: FOLDER 219) Technical Support Manual, TEXTA Manual, 1955 

   (Folder ID: FOLDER 220) Fundamentals of Transmission Security-Joint, 1952 

Folder ID: (FOLDER 221) - Folder not releasable

   (Folder ID: FOLDER 222) Department of the Army Technical Manual (Tm) 32-250/Department of the Air Force Manual (Afm) 100-80, Fundamentals of Traffic Analysis (Radio-Telegraph), 1948 

   (Folder ID: FOLDER 225) Technical Paper by Abraham Sinkov, Junior Cryptanalyst, Permutation Tables Involving A Feature of Non-Transposability, War Department, Office of the Chief Signal Officer, 1934 

   (Folder ID: FOLDER 226) Technical Paper by William Friedman, Cryptanalyst, Chief of Signal Intelligence Section, Principles of Indirect Symmetry of Position In Secondary Alphabets and Their Application In the Solution of Polyalphabetic Substitution Ciphers, War Department, Office of the Chief Signal Officer, 1935 

   (Folder ID: FOLDER 227) Technical Paper by Frank B. Rowlett, Junior Cryptanalyst, Further Applications of the Principles of Indirect Symmetry of Position In Secondary Alphabets, War Department, Office of the Chief Signal Officer, 1935 

   (Folder ID: FOLDER 228) Technical Paper by Solomon Kullback, Associate Cryptanalyst, Statistical Methods In Cryptanalysis, Revised Edition, War Department, Office of the Chief Signal Officer, 1938 

   (Folder ID: FOLDER 229) NSA-725, Crypto-Linguistic Working Aid No. 3, Russian Dictionary Reverse Alphabetic Sort, June 1955 

   (Folder ID: FOLDER 230) Army Security Agency, Table of the Binomial Distribution, May 1946 

   (Folder ID: FOLDER 231) the Index of Coincidence, January 1955 (with Signed Dedication to William Friedman by Howard Campaigne), Statistics for Cryptology 1955 

   (Folder ID: FOLDER 232) Directorate of Intelligence, Headquarters of the United States Air Force, Indications List (Indications of Soviet Preparations to Initiate General War and Indications of Soviet Preparations to Launch an Atomic Air Assault Against Continental United States), 1953; Basic Cryptologic Glossary (Draft), 1954 

   (Folder ID: FOLDER 233) Technical Paper by William Friedman, the Index of Coincidence and Its Applications In Cryptanalysis, War Department, Office of the Chief Signal Officer, 1935 (Reproduction Copy) 

   (Folder ID: FOLDER 234) Basis Cryptologic Glossary, 1955; Draft Samplings for the Unabridged Cryptologic Glossary, 1955 

   (Folder ID: FOLDER 235) Army Extension Courses, Advanced Military Cryptography Special Text No. 166, 1935 Edition (2 Copies) and 1943 Edition 

   (Folder ID: FOLDER 236) Army Extension Courses, Solutions-Elementary Military Cryptography, 1943; Army Extension Courses, Sub Course, Elementary Military Cryptography Introduction and Lesson 1, 1943; Army Extension Courses, Elementary Military Cryptography, Special Text No. 165, 1935 Edition; Army Extension Courses, Elementary Military Cryptography, Special Text No. 165, 1943 Edition 

   (Folder ID: FOLDER 237) Training Pamphlet No. 3, Elements of Cryptanalysis, May 1923 

   (Folder ID: FOLDER 238) Tm 32-220 Basic Cryptography, April 1950 

   (Folder ID: FOLDER 239) Army Extension Courses, Special Text No. 166 Original Edition, Advanced Military Cryptography, 1931 

   (Folder ID: FOLDER 240) Department of the Army, Office of the Chief of Military History, German Radio Intelligence, Albert Praun, 1950 (2 Copies with Different Classifications), Including Memoranda Regarding the Document, 1953 

   (Folder ID: FOLDER 241) National Security Agency, Military Cryptanalysis, Part I, Fourth Edition, by William Friedman, Revised and Enlarged by Lambros D. Callimahos, December 1952 

   (Folder ID: FOLDER 242) National Security Agency, Military Cryptanalytics, Part I, by William Friedman and Lambros D. Callimahos, December 1952 

   (Folder ID: FOLDER 243) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, by William Friedman Part I, Third Edition, 1942 

   (Folder ID: FOLDER 244) Extension Course of the Army Security Agency, Sub Course 20-6, Military Cryptanalysis, Part I, Monoalphabetic Substitution Systems, June 1947 

   (Folder ID: FOLDER 245) National Security Agency, Military Cryptanalytics, by William F. Friedman and Lambros D. Callimahos Part I, April 1956 (This Copy Includes A Dedication from Callimahos to Friedman, Which In Turn Is Spelling Out A Message "Bacon Did Not Write This Work." 

   (Folder ID: FOLDER 246) Army Extension Courses, Sub Course: Military Cryptanalysis Part I, Monoalphabetic Substitution System, Lesson Assignment Sheets, 1936-1937 

   (Folder ID: FOLDER 247) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, by William Friedman, Part I Monoalphabetic Substitution Systems & Part II Simple Varieties of Polyalphabetic Substitution Systems, 1938 

   (Folder ID: FOLDER 248) Military Cryptanalysis Part 1, Appendix 2, Cryptanalyst's Manual, List of Words Used In Military Text Arranged Alphabetically According to Word Length, November 1946 

   (Folder ID: FOLDER 249) Military Cryptanalysis, Part I, Monoalphabetic Substitution Systems, by William Friedman, 1936 

   (Folder ID: FOLDER 250) National Security Agency, Problem Book, Course, Military Cryptanalytics Part 1, May 1954 

   (Folder ID: FOLDER 251) National Security Agency, Course In Military Cryptanalysis, Part 1, December 1952 

   (Folder ID: FOLDER 252) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, Part II, Simpler Varieties of Polyalphabetic Substitution Systems, by William Friedman, 1938 and Two Copies of 1941 (One Copy with Minor Revisions) 

   (Folder ID: FOLDER 253) National Security Agency, Military Cryptanalysis, Part II, Interim Edition (First Section), by William Friedman and Lambros Callimahos, December 1955 

   (Folder ID: FOLDER 254) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, Part II, Simpler Varieties of Polyalphabetic Substitution Systems, by William Friedman, 1937 and 1943 Third Edition 

   (Folder ID: FOLDER 255) National Security Agency, Military Cryptanalysis, Part I, Course Lesson #8, 9, 10, 1941-1956 

   (Folder ID: FOLDER 256) National Security Agency, Training Division, Problems In Depth-Reading, June 1954; Problems In the Cryptanalysis of the Zen-40 Cipher Machine, June 1954 

   (Folder ID: FOLDER 257) National Security Agency, Military Cryptanalysis, Part II, by Lambros Callimahos and William Friedman, Interim Edition (Second and Third Sections), February 1958 

   (Folder ID: FOLDER 258) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, Part III, 1939 (with Minor Revisions); Solution of Progressive-Alphabet Cipher with Unknown Mixed Primary Alphabets; Solution of Progressive-Alphabet Cipher with Standard Plaintext Alphabet and Unknown Mixed Cipher Alphabet; Solution of Plain Text Auto Key Problem Using Unknown Identical Primaries by Paul H. Burdick, September 1941 

   (Folder ID: FOLDER 259) Army Extension Courses, Sub Course, Military Cryptanalysis, Part III, Simple Types of Aperiodic Substitution System, 1938-1939 (Introduction and Lesson 1) 

   (Folder ID: FOLDER 260) Report, Brochure, and Photographs of the Hand-Driven Ciphering Machine, Type Hc-4, 1954 

   (Folder ID: FOLDER 263) War Department, Office of the Chief Signal Officer, Military Cryptanalysis Part IV, Transposition and Fractionating Systems, by William Friedman, 1941 

   (Folder ID: FOLDER 265) War Secrets In the Ether Parts III by Wilhelm F. Flicke, Translated by Ray W. Pettengill, 1953 

   (Folder ID: FOLDER 267) War Department, American Army Field Codes In the American Expeditionary Forces During the First World War, by William F. Friedman, June 1942 

   (Folder ID: FOLDER 268) War Department, Office of the Chief Signal Officer, Technical Paper of the Signal Intelligence Section War Plans and Training Division, German Military Ciphers from February to November, 1918, 1935 (with Notes Regarding the Copy Held at the Library of Congress) 

   (Folder ID: FOLDER 269) War Department, Office of the Chief Signal Officer, Technical Paper of the Signal Intelligence Section, War Plans and Training Division, General Solution for the ADFGVX Cipher System, 1934 

   (Folder ID: FOLDER 270) War Department, Office of the Chief Signal Officer, Studies In German Diplomatic Codes Employed During the World War: Code 18470 and Its Derivatives, the "Fuenfbuchstabenheft, German Methods Of Code Encipherment, By Charles J. Mendelshon, 1937 

   (Folder ID: FOLDER 389) Army Security Agency (ASA) Discussion Topics Newsletters (1953), ASA Review Newsletters (May-June 1947, July-August 1947, May-June 1950), 1947-1953 

   (Folder ID: FOLDER 410) NSA Regulation, NSA Civilian Personnel Screening Board and Appointments to the NSA Civilian Personnel Screening Board, 1952-1954 

   (Folder ID: FOLDER 437) Technical Paper, War Department, Office of the Chief Signal Officer, Field Codes Used by the German Army During the World War, by William F. Friedman, 1935 

   (Folder ID: FOLDER 438) Technical Paper of the Signal Intelligence Section, War Plans and Training Division, Principles of Solution of Military Field Codes Used by the German Army In 1917, 1935 

   (Folder ID: FOLDER 439) Technical Paper by Solomon Kullback, PH.D., Junior Cryptanalyst of the Signal Intelligence Section, War Plans and Training Division, General Solution for the Double Transposition Cipher, 1934 

   (Folder ID: FOLDER 440) War Department, Division Field Code Book No. 4, 1922 

   (Folder ID: FOLDER 452) War Department Office of the Chief Signal Officer, Military Cryptanalysis Part IV, Transposition and Fractionating Systems, by William Friedman, Principal Cryptanalysis, Signal Intelligence Officer (Preliminary Edition), 1939 

   (Folder ID: FOLDER 465) War Department, Arlington Hall Message and Code Center, Procedures and Processing Times, 1943 

   (Folder ID: FOLDER 500) Saturday Evening Post, Including Article Called "Are We Stifling The Inventors?" by Captain George N. Robillard, US Navy, 9 June 1951 

   (Folder ID: FOLDER 507) Riverbank Laboratory Publications: Synoptic Tables for the Solution of Ciphers and Bibliography of Cipher Literature, 1918; Methods for the Reconstruction of Primary Alphabets, 1918; the Production and Detection of Messages In Concealed Writing and Images, 1918 

   (Folder ID: FOLDER 508) Military Cryptanalysis: Part II Simpler Varieties of Polyalphabetic Substitution Systems by William F. Friedman Principal Cryptanalyst, Prepared Under the Direction of the Chief Signal Officer, 1937 

   (Folder ID: FOLDER 509) Army Extension Courses: Subcourse-Military Cryptanalysis Part II, Simpler Varieties of Polyalphabetic Substitution Systems, 1937 

   (Folder ID: FOLDER 511) Military Cryptanalysis: Part III Aperiodic Substitution Systems by William F. Friedman, Principal Cryptanalyst, Signal Intelligence Service, Prepared Under the Direction of the Chief Signal Officer, 1938 

   (Folder ID: ACC15281) Publication, the Friedman Lectures on Cryptology by William F. Friedman, 1965. 

   (Folder ID: ACC21609) National Security Agency, Office of Training Services, Codes and Ciphers (Cryptology) by William F. Friedman, 1961 

   (Folder ID: ACC35225) William Friedman's Copy of John C. Hartfield "Lisbonian" Selection of Roots and Terminals, Containing 21,323 Five Letter Words Equal to 454,670,329 Ten Letter Words, of A Clear, Euphonious and Pronounceable Character. with at Least 2 Letters Difference Between Each Group of 5 Letters, and Telegraphically Dissimilar by European and American Morse. Each Syllable of Which Is In Current Use and Can Be Verified by Dictionaries and the Official Vocabulary. In Strict Accordance with the Decision of the Lisbon Telegraph Conference, 1908, Governing the Use of Artificial Words. Compiled by John Charles Hartfield, 1911. 

   (Folder ID: ACC35288) Book Foreword "Weitzenbock, Dr. Roland Invariantentheorie, P. Noordhoff, 1923, Groningen" with Comment by Friedman, 1954 

   (Folder ID: ACC4402) Report on German Military Ciphers with Corrections from William F. Friedman, 1918 

   (Folder ID: ACC47587) Training Course Material from Col. Tiltman to Friedman, Signals Intelligence Course Volume I: Explanatory Text and Short Exercises, Volume II: Solutions. Includes Computer Tabulated Figures for the Exercises and Three Cardboard Discs for Encoding and Decoding the Course Material, 1942 

   (Folder ID: ACC50341) Friedman's Copies of Army Regulations, Classification Marking and Safeguarding Military Information (AR-70, 330-5, 105-5, 105-25), 1922-1946 

   (Folder ID: FOLDER 012) War Department Office of the Chief Signal Officer, Washington. Final Report of the Radio Intelligence Section, General Staff General Headquarters American Expeditionary Forces, Register No. 181, Technical Paper of the Signal Intelligence Section War Plans & Training Division, 1935 

   (Folder ID: FOLDER 075) War Department Technical Manual (Tm) 11-380 Converter M-209, M-209-A, M-209-B Cipher 17 March 1944 

   (Folder ID: FOLDER 205) Articles on Cryptography and Cryptanalysis Reprinted from the Signal Corps Bulletin, War Department of the Chief Signal Officer of the United States, 1942 

   (Folder ID: FOLDER 206) the Signal Corps Bulletin No. 97, the War Department, Office of the Chief Signal Officer of the United States, July-Sept 1937 

   (Folder ID: FOLDER 213) the Contribution of the Cryptographic Bureaus In the World War, War Department, Office of the Chief Signal Officer, Reprinted from Signal Corps Bulletin Nos. 75-81, 1935 

   (Folder ID: FOLDER 214) Technical Paper of the Signal Intelligence Section War Plans and Training Division, Notes on the Liaison Service and the Liaison Intelligence Service of the German Army During the World War, War Department, Office of the Chief Signal Officer, 1935 

   (Folder ID: FOLDER 219) Technical Support Manual, TEXTA Manual, 1955 

   (Folder ID: FOLDER 220) Fundamentals of Transmission Security-Joint, 1952 

Folder ID: (FOLDER 221) - Folder not releasable

   (Folder ID: FOLDER 222) Department of the Army Technical Manual (Tm) 32-250/Department of the Air Force Manual (Afm) 100-80, Fundamentals of Traffic Analysis (Radio-Telegraph), 1948 

   (Folder ID: FOLDER 225) Technical Paper by Abraham Sinkov, Junior Cryptanalyst, Permutation Tables Involving A Feature of Non-Transposability, War Department, Office of the Chief Signal Officer, 1934 

   (Folder ID: FOLDER 226) Technical Paper by William Friedman, Cryptanalyst, Chief of Signal Intelligence Section, Principles of Indirect Symmetry of Position In Secondary Alphabets and Their Application In the Solution of Polyalphabetic Substitution Ciphers, War Department, Office of the Chief Signal Officer, 1935 

   (Folder ID: FOLDER 227) Technical Paper by Frank B. Rowlett, Junior Cryptanalyst, Further Applications of the Principles of Indirect Symmetry of Position In Secondary Alphabets, War Department, Office of the Chief Signal Officer, 1935 

   (Folder ID: FOLDER 228) Technical Paper by Solomon Kullback, Associate Cryptanalyst, Statistical Methods In Cryptanalysis, Revised Edition, War Department, Office of the Chief Signal Officer, 1938 

   (Folder ID: FOLDER 229) NSA-725, Crypto-Linguistic Working Aid No. 3, Russian Dictionary Reverse Alphabetic Sort, June 1955 

   (Folder ID: FOLDER 230) Army Security Agency, Table of the Binomial Distribution, May 1946 

   (Folder ID: FOLDER 231) the Index of Coincidence, January 1955 (with Signed Dedication to William Friedman by Howard Campaigne), Statistics for Cryptology 1955 

   (Folder ID: FOLDER 232) Directorate of Intelligence, Headquarters of the United States Air Force, Indications List (Indications of Soviet Preparations to Initiate General War and Indications of Soviet Preparations to Launch an Atomic Air Assault Against Continental United States), 1953; Basic Cryptologic Glossary (Draft), 1954 

   (Folder ID: FOLDER 233) Technical Paper by William Friedman, the Index of Coincidence and Its Applications In Cryptanalysis, War Department, Office of the Chief Signal Officer, 1935 (Reproduction Copy) 

   (Folder ID: FOLDER 234) Basis Cryptologic Glossary, 1955; Draft Samplings for the Unabridged Cryptologic Glossary, 1955 

   (Folder ID: FOLDER 235) Army Extension Courses, Advanced Military Cryptography Special Text No. 166, 1935 Edition (2 Copies) and 1943 Edition 

   (Folder ID: FOLDER 236) Army Extension Courses, Solutions-Elementary Military Cryptography, 1943; Army Extension Courses, Sub Course, Elementary Military Cryptography Introduction and Lesson 1, 1943; Army Extension Courses, Elementary Military Cryptography, Special Text No. 165, 1935 Edition; Army Extension Courses, Elementary Military Cryptography, Special Text No. 165, 1943 Edition 

   (Folder ID: FOLDER 237) Training Pamphlet No. 3, Elements of Cryptanalysis, May 1923 

   (Folder ID: FOLDER 238) Tm 32-220 Basic Cryptography, April 1950 

   (Folder ID: FOLDER 239) Army Extension Courses, Special Text No. 166 Original Edition, Advanced Military Cryptography, 1931 

   (Folder ID: FOLDER 240) Department of the Army, Office of the Chief of Military History, German Radio Intelligence, Albert Praun, 1950 (2 Copies with Different Classifications), Including Memoranda Regarding the Document, 1953 

   (Folder ID: FOLDER 241) National Security Agency, Military Cryptanalysis, Part I, Fourth Edition, by William Friedman, Revised and Enlarged by Lambros D. Callimahos, December 1952 

   (Folder ID: FOLDER 242) National Security Agency, Military Cryptanalytics, Part I, by William Friedman and Lambros D. Callimahos, December 1952 

   (Folder ID: FOLDER 243) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, by William Friedman Part I, Third Edition, 1942 

   (Folder ID: FOLDER 244) Extension Course of the Army Security Agency, Sub Course 20-6, Military Cryptanalysis, Part I, Monoalphabetic Substitution Systems, June 1947 

   (Folder ID: FOLDER 245) National Security Agency, Military Cryptanalytics, by William F. Friedman and Lambros D. Callimahos Part I, April 1956 (This Copy Includes A Dedication from Callimahos to Friedman, Which In Turn Is Spelling Out A Message "Bacon Did Not Write This Work." 

   (Folder ID: FOLDER 246) Army Extension Courses, Sub Course: Military Cryptanalysis Part I, Monoalphabetic Substitution System, Lesson Assignment Sheets, 1936-1937 

   (Folder ID: FOLDER 247) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, by William Friedman, Part I Monoalphabetic Substitution Systems & Part II Simple Varieties of Polyalphabetic Substitution Systems, 1938 

   (Folder ID: FOLDER 248) Military Cryptanalysis Part 1, Appendix 2, Cryptanalyst's Manual, List of Words Used In Military Text Arranged Alphabetically According to Word Length, November 1946 

   (Folder ID: FOLDER 249) Military Cryptanalysis, Part I, Monoalphabetic Substitution Systems, by William Friedman, 1936 

   (Folder ID: FOLDER 250) National Security Agency, Problem Book, Course, Military Cryptanalytics Part 1, May 1954 

   (Folder ID: FOLDER 251) National Security Agency, Course In Military Cryptanalysis, Part 1, December 1952 

   (Folder ID: FOLDER 252) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, Part II, Simpler Varieties of Polyalphabetic Substitution Systems, by William Friedman, 1938 and Two Copies of 1941 (One Copy with Minor Revisions) 

   (Folder ID: FOLDER 253) National Security Agency, Military Cryptanalysis, Part II, Interim Edition (First Section), by William Friedman and Lambros Callimahos, December 1955 

   (Folder ID: FOLDER 254) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, Part II, Simpler Varieties of Polyalphabetic Substitution Systems, by William Friedman, 1937 and 1943 Third Edition 

   (Folder ID: FOLDER 255) National Security Agency, Military Cryptanalysis, Part I, Course Lesson #8, 9, 10, 1941-1956 

   (Folder ID: FOLDER 256) National Security Agency, Training Division, Problems In Depth-Reading, June 1954; Problems In the Cryptanalysis of the Zen-40 Cipher Machine, June 1954 

   (Folder ID: FOLDER 257) National Security Agency, Military Cryptanalysis, Part II, by Lambros Callimahos and William Friedman, Interim Edition (Second and Third Sections), February 1958 

   (Folder ID: FOLDER 258) War Department, Office of the Chief Signal Officer, Military Cryptanalysis, Part III, 1939 (with Minor Revisions); Solution of Progressive-Alphabet Cipher with Unknown Mixed Primary Alphabets; Solution of Progressive-Alphabet Cipher with Standard Plaintext Alphabet and Unknown Mixed Cipher Alphabet; Solution of Plain Text Auto Key Problem Using Unknown Identical Primaries by Paul H. Burdick, September 1941 

   (Folder ID: FOLDER 259) Army Extension Courses, Sub Course, Military Cryptanalysis, Part III, Simple Types of Aperiodic Substitution System, 1938-1939 (Introduction and Lesson 1) 

   (Folder ID: FOLDER 260) Report, Brochure, and Photographs of the Hand-Driven Ciphering Machine, Type Hc-4, 1954 

   (Folder ID: FOLDER 263) War Department, Office of the Chief Signal Officer, Military Cryptanalysis Part IV, Transposition and Fractionating Systems, by William Friedman, 1941 

   (Folder ID: FOLDER 265) War Secrets In the Ether Parts III by Wilhelm F. Flicke, Translated by Ray W. Pettengill, 1953 

   (Folder ID: FOLDER 267) War Department, American Army Field Codes In the American Expeditionary Forces During the First World War, by William F. Friedman, June 1942 

   (Folder ID: FOLDER 268) War Department, Office of the Chief Signal Officer, Technical Paper of the Signal Intelligence Section War Plans and Training Division, German Military Ciphers from February to November, 1918, 1935 (with Notes Regarding the Copy Held at the Library of Congress) 

   (Folder ID: FOLDER 269) War Department, Office of the Chief Signal Officer, Technical Paper of the Signal Intelligence Section, War Plans and Training Division, General Solution for the ADFGVX Cipher System, 1934 

   (Folder ID: FOLDER 270) War Department, Office of the Chief Signal Officer, Studies In German Diplomatic Codes Employed During the World War: Code 18470 and Its Derivatives, the "Fuenfbuchstabenheft, German Methods Of Code Encipherment, By Charles J. Mendelshon, 1937 

   (Folder ID: FOLDER 389) Army Security Agency (ASA) Discussion Topics Newsletters (1953), ASA Review Newsletters (May-June 1947, July-August 1947, May-June 1950), 1947-1953 

   (Folder ID: FOLDER 410) NSA Regulation, NSA Civilian Personnel Screening Board and Appointments to the NSA Civilian Personnel Screening Board, 1952-1954 

   (Folder ID: FOLDER 437) Technical Paper, War Department, Office of the Chief Signal Officer, Field Codes Used by the German Army During the World War, by William F. Friedman, 1935 

   (Folder ID: FOLDER 438) Technical Paper of the Signal Intelligence Section, War Plans and Training Division, Principles of Solution of Military Field Codes Used by the German Army In 1917, 1935 

   (Folder ID: FOLDER 439) Technical Paper by Solomon Kullback, PH.D., Junior Cryptanalyst of the Signal Intelligence Section, War Plans and Training Division, General Solution for the Double Transposition Cipher, 1934 

   (Folder ID: FOLDER 440) War Department, Division Field Code Book No. 4, 1922 

   (Folder ID: FOLDER 452) War Department Office of the Chief Signal Officer, Military Cryptanalysis Part IV, Transposition and Fractionating Systems, by William Friedman, Principal Cryptanalysis, Signal Intelligence Officer (Preliminary Edition), 1939 

   (Folder ID: FOLDER 465) War Department, Arlington Hall Message and Code Center, Procedures and Processing Times, 1943 

   (Folder ID: FOLDER 500) Saturday Evening Post, Including Article Called "Are We Stifling The Inventors?" by Captain George N. Robillard, US Navy, 9 June 1951 

   (Folder ID: FOLDER 507) Riverbank Laboratory Publications: Synoptic Tables for the Solution of Ciphers and Bibliography of Cipher Literature, 1918; Methods for the Reconstruction of Primary Alphabets, 1918; the Production and Detection of Messages In Concealed Writing and Images, 1918 

   (Folder ID: FOLDER 508) Military Cryptanalysis: Part II Simpler Varieties of Polyalphabetic Substitution Systems by William F. Friedman Principal Cryptanalyst, Prepared Under the Direction of the Chief Signal Officer, 1937 

   (Folder ID: FOLDER 509) Army Extension Courses: Subcourse-Military Cryptanalysis Part II, Simpler Varieties of Polyalphabetic Substitution Systems, 1937 

   (Folder ID: FOLDER 511) Military Cryptanalysis: Part III Aperiodic Substitution Systems by William F. Friedman, Principal Cryptanalyst, Signal Intelligence Service, Prepared Under the Direction of the Chief Signal Officer, 1938 

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