File:USpatent1310719.fig1.png
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Summary
| Description |
English: Vernam cipher patent, Figure 1. This drawing shows Gilbert Vernam's original concept for a teletype encryption machine that combines plaintext characters (C) with characters on a key paper tape (D) using an XOR function. The XOR takes place at relays 19 through 25. If both the C and D contacts are open, no voltage is applied to the relay coil. If both C and D contacts are closed, voltage is applied to both ends of the relay coil, so the relay contacts stay open. If just one of contacts C and D are closed, current flows through the relay coil, closing its contact. |
| Source | US patent US1310719A ([[{{{y}}}-{{{m}}}-{{{d}}}]]) S. Verman Secret Signaling System |
| Author | S. Verman |
Licensing
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In general, the contents of United States patents are in the public domain.
In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):
The original patent should be checked for the presence of such language before an assumption is made that the contents are in the public domain. (This template can be replaced by {{PD-US-patent-no notice}} in such cases.)
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Original upload log
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 2004-11-23 15:27 | 443×634× (59281 bytes) | ArnoldReinhold | Vernam cipher patent, Figure 1 |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:48, 13 May 2015 | | 443 × 634 (58 KB) | BD2412 | Transferred from en.wikipedia |
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