Cryptologic Quarterly

The professional journal of the National Security Agency/Central Security Service. Its mission is to advance knowledge of all aspects of cryptology by serving as a forum for issues related to cryptologic theory doctrine operations management and history.

Below is a list of Cryptologic Quarterly issues available in PDF format. Limited print copies may be requested from the Center for Cryptologic History via our online form.

  • Cryptologic Quarterly Vol. 38 Issue 2019-01 | Format: PDF
    • 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
  • Cryptologic Quarterly Vol. 36 Issue 2017-03 | Format: PDF
    • 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 Vol. 34 Issue 2015-01 | Format: PDF
    • 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
  • Cryptologic Quarterly Vol. 33 Issue 2014-01 | Format: PDF
    • 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