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 sold by [[Italy|Italian]] firm [[Ottico Meccanica Italiana]] (OMI) in [[Rome]]. |
The '''OMI cryptograph''' was a [[rotor cipher machine]] produced and sold by [[Italy|Italian]] firm [[Ottico Meccanica Italiana]] (OMI) in [[Rome]]. |
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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 a large number of permutations for the rotor selection. |
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 a large number of permutations for the rotor selection. |
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The machine was offered for sale during the 1960s.<ref>{{cite web|url=http://www.quadibloc.com/crypto/ro020404.htm|title=Relatives of the Enigma|work=quadibloc.com}}</ref> |
The machine was offered for sale during the 1960s.<ref>{{cite web|url=http://www.quadibloc.com/crypto/ro020404.htm|title=Relatives of the Enigma|work=quadibloc.com}}</ref> |
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==References== |
==References== |
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{{Reflist}} |
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* Cipher A. Deavours and Louis Kruh, "Machine Cryptography and Modern Cryptanalysis", Artech House, 1985, pp. 146–147 |
* Cipher A. Deavours and Louis Kruh, "Machine Cryptography and Modern Cryptanalysis", Artech House, 1985, pp. 146–147 |
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* [[F. L. Bauer]], ''Decrypted Secrets'', 2nd edition, Springer-Verlag, 2000, ISBN 3-540-66871-3, pp. 112,136. |
* [[F. L. Bauer]], ''Decrypted Secrets'', 2nd edition, Springer-Verlag, 2000, ISBN 3-540-66871-3, pp. 112,136. |
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Revision as of 05:51, 18 May 2015
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 a large number of permutations for the rotor selection.
The machine was offered for sale during the 1960s.[1]
References
- ^ "Relatives of the Enigma". quadibloc.com.
- 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.
