OMI cryptograph: Difference between revisions
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[[Image:OMI-cryptograph.jpg|320px|right|thumb|The OMI cryptograph was a seven-rotor machine produced by Italian firm [[Ottico Meccanica Italiana]].]] |
[[Image:OMI-cryptograph.jpg|320px|right|thumb|The OMI cryptograph was a seven-rotor machine produced by Italian firm [[Ottico Meccanica Italiana]].]] |
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The '''OMI cryptograph''' was a [[rotor cipher machine]] produced and marketed by [[Italy|Italian]] firm [[Ottico Meccanica Italiana]] (OMI) in [[Rome]]. The machine had seven rotors, including a reflecting rotor. Each rotor could be assembled from two sections with different wiring: one section consisted 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 to alow a large number of permutations for the key. The stepping of the machine was |
The '''OMI cryptograph''' was a [[rotor cipher machine]] produced and marketed by [[Italy|Italian]] firm [[Ottico Meccanica Italiana]] (OMI) in [[Rome]]. The machine had seven rotors, including a reflecting rotor. Each rotor could be assembled from two sections with different wiring: one section consisted 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 to alow a large number of permutations for the key. The stepping of the machine was regular. |
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The machine was offered for sale during the 1960s[http://www.quadibloc.com/crypto/ro020404.htm]. |
The machine was offered for sale during the 1960s[http://www.quadibloc.com/crypto/ro020404.htm]. |
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Revision as of 16:04, 13 January 2006
The OMI cryptograph was a rotor cipher machine produced and marketed by Italian firm Ottico Meccanica Italiana (OMI) in Rome. The machine had seven rotors, including a reflecting rotor. Each rotor could be assembled from two sections with different wiring: one section consisted 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 to alow a large number of permutations for the key. The stepping of the machine was regular.
The machine was offered for sale during the 1960s[1].
References
- Cipher A. Deavours and Louis Kruh, "Machine Cryptography and Modern Cryptanalysis", Artech House, 1985, pp. 146–147