Texts and Manuals.
This section will feature texts and manuals, primarily on Spanish cryptology, although we will also include others that, due to their historical value, are important to preserve. The texts are transcriptions of the originals or, where applicable, original contributions from researchers who have granted permission for their publication, and to whom we are grateful.
- User Manual for the Clave Norte.
- User Manual for the Enigma machine used in Spain.
- User Manual for the Kryha machine used in Spain.
- The Nema cipher machine.
- An Introduction to Spanish crytology up to the Spanish Civil War.
- The grid. History of an Encryption Instrument.
- Reproduction of a chapter dedicated to cryptography from a 1957 Army Engineers Academy Tactics textbook
- Cryptanalysis of the G cipher used by General Mola and Lieutenant Colonel Yagüe to coordinate preparations for the military rebellion.
- How to Design a Secure Tactical Cipher. The "Homofonix" multiple homophonic cipher.
- Enigma in Spain.
- The classic "Isomorphism and its applications in cryptanalytics" by Rosario Candela.
- Le Chiffre. lecture given by Marcel Givierge in 1927 (in French).
- Question de Chifre. A lecture given by an officer of the cipher service on January 28, 1923 (in French).