Machine Secrets: a Book Review. - Frode Weierud (Cryptologia, 1986)

Naval Enigma: M4 and its Rotors. - Ralph Erskine; Frode Weierud (Cryptologia, 1987)

Enigma Variations: an Extended Family of Machines. - David H. Hamer; Geoff Sullivan; Frode Weierud (Cryptologia, 1998)

Sweden Cryptographic Superpower a Book Review. - Frode Weierud (Cryptologia, 1998)

The Swiss NEMA Cipher Machine. - Geoff Sullivan; Frode Weierud (Cryptologia, 1999)

Recovering the Wiring of Enigma's Umkehrwalze A. - Philip Marks; Frode Weierud (Cryptologia, 2000)

Purple Revealed: Simulation and Computer-Aided Cryptanalysis of Angooki Taipu B. - Wes Freeman; Geoff Sullivan; Frode Weierud (Cryptologia, 2003)

Breaking German Army Ciphers. - Geoff Sullivan; Frode Weierud (Cryptologia, 2005)

Spanish Enigma: A History of the Enigma in Spain. - José Ramón Soler Fuensanta; Francisco Javier López-Brea Espiau; Frode Weierud (Cryptologia, 2010)

History and Modern Cryptanalysis of Enigma's Pluggable Reflector. - Olaf Ostwald; Frode Weierud (Cryptologia, 2016)

Modern breaking of Enigma ciphertexts. - Olaf Ostwald; Frode Weierud (Cryptologia, 2017)

Enigma G: The counter Enigma. - David Kenyon; Frode Weierud (Cryptologia, 2020)

German mathematicians and cryptology in WWII. - Frode Weierud; Sandy Zabell (Cryptologia, 2020)

In memoriam: Thomas Ralph Erskine CB (1933 - 2021). - Frode Weierud (Cryptologia, 2021)

Eavesdropping on the Biafra-Lisbon link - breaking historical ciphers from the Biafran war. - Richard W. Bean; George Lasry; Frode Weierud (Cryptologia, 2022)

Modern cryptanalysis of the Truppenschlüssel. - Olaf Ostwald; Frode Weierud (Cryptologia, 2023)