OMI cryptograph
The OMI cryptograph was a rotor cipher machine produced and sold by Italian firm Ottico Meccanica Italiana (OMI) in Rome.
The machine had seven rotors, including a reflecting rotor. The rotors stepped regularly. Each rotor could be assembled from two sections with different wiring: one section consisted of a "frame" containing ratchet notches, as well as some wiring, while the other section consisted of a "slug" with a separate wiring. The slug section fitted into the frame section, and different slugs and frames could be interchanged with each other. As a consequence, there were many permutations for the rotor selection.
The machine was offered for sale during the 1960s.{{cite web|url=http://www.quadibloc.com/crypto/ro020404.htm|title=Relatives of the Enigma|work=quadibloc.com}}
References
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- Cipher A. Deavours and Louis Kruh, "Machine Cryptography and Modern Cryptanalysis", Artech House, 1985, pp. 146–147
- F. L. Bauer, Decrypted Secrets, 2nd edition, Springer-Verlag, 2000, {{ISBN|3-540-66871-3}}, pp. 112,136.
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