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  1. Modern cryptanalysis of the Truppenschlüssel

    Article • Cryptologia, January 2022, Taylor & Francis

    Frode Weierud

  2. In memoriam: Thomas Ralph Erskine CB (1933 – 2021)

    Article • Cryptologia, July 2021, Taylor & Francis

    Frode Weierud

  3. Eavesdropping on the Biafra-Lisbon link – breaking historical ciphers from the Biafran war

    Article • Cryptologia, June 2020, Taylor & Francis

    Frode Weierud

  4. The history and use of Enigma G, the counter Enigma, also known as the Abwehr Enigma.

    Article • Cryptologia, October 2019, Taylor & Francis

    David Kenyon, Frode Weierud

  5. German mathematicians and their work in cryptology during the Second World War

    Article • Cryptologia, June 2019, Taylor & Francis

    Frode Weierud, Sandy Zabell Zabell

  6. Modern methods for breaking of Enigma ciphertexts

    Article • Cryptologia, January 2017, Taylor & Francis

    Frode Weierud

  7. History and Modern Cryptanalysis of Enigma's Pluggable Reflector

    Article • Cryptologia, August 2015, Taylor & Francis

    Frode Weierud

  8. Spanish Enigma: A History of the Enigma in Spain

    Article • Cryptologia, September 2010, Taylor & Francis

    Frode Weierud

  9. Bletchley Park’s Sturgeon—The Fish That Laid No Eggs

    Article • February 2006, Oxford University Press (OUP)

    Frode Weierud

  10. BREAKING GERMAN ARMY CIPHERS

    Article • Cryptologia, July 2005, Taylor & Francis

    Frode Weierud

  11. PURPLE REVEALED: SIMULATION AND COMPUTER-AIDED CRYPTANALYSIS OF ANGOOKI TAIPU B

    Article • Cryptologia, January 2003, Taylor & Francis

    Frode Weierud

  12. RECOVERING THE WIRING OF ENIGMA'S UMKEHRWALZE A

    Article • Cryptologia, January 2000, Taylor & Francis

    Frode Weierud

  13. The Geheimschreiber Secret

    Article • January 2000, Springer Science + Business Media

    Frode Weierud

  14. Sturgeon, The FISH BP Never Really Caught

    Article • January 2000, Springer Science + Business Media

    Frode Weierud

  15. THE SWISS NEMA CIPHER MACHINE

    Article • Cryptologia, October 1999, Taylor & Francis

    Frode Weierud

  16. ENIGMA VARIATIONS: AN EXTENDED FAMILY OF MACHINES

    Article • Cryptologia, July 1998, Taylor & Francis

    Frode Weierud

  17. SWEDEN CRYPTOGRAPHIC SUPERPOWER A BOOK REVIEW

    Article • Cryptologia, January 1998, Taylor & Francis

    Frode Weierud

  18. NAVAL ENIGMA: M4 AND ITS ROTORS

    Article • Cryptologia, October 1987, Taylor & Francis

    Frode Weierud

  19. MACHINE SECRETS: A BOOK REVIEW

    Article • Cryptologia, January 1986, Taylor & Francis

    Frode Weierud