File:TTY mixer 131B2 TM-11-2222 Fig 3.jpg
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Summary
[edit]DescriptionTTY mixer 131B2 TM-11-2222 Fig 3.jpg |
English: Type 131B2 mixer, used by the U.S. to encrypt teletypewriter transmissions during World War II and up to 1960 by combining plaintext data with a binary key stream using the XOR operation. Used with w:SIGTOT one-time-tape and w:SIGSUM key generator. Later renamed AN/FGQ-1. Unit photographed from the rear with grill removed. Large cylinders are WEco. 255 polar relays. |
Date | |
Source | http://www.navy-radio.com/manuals/tty/fgq1-tm-11-2209.pdf Figure 3 in Department of the Army Technical Manual TM-11-2209 |
Author | Unknown authorUnknown author |
Licensing
[edit]Public domainPublic domainfalsefalse |
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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current | 21:55, 8 April 2019 | 625 × 725 (364 KB) | ArnoldReinhold (talk | contribs) | User created page with UploadWizard |
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Date and time of data generation | 16:04, 8 April 2019 |
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Short title | TTY mixer 131B2 TM-11-2222 Fig 3 |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Photos 4.0 |
File change date and time | 16:04, 8 April 2019 |
Date and time of digitizing | 16:04, 8 April 2019 |
IIM version | 2 |