Image: SIS women using Purple Analog
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Description: Two women at work at the U.S. Army w:Signal Intelligence Service during World War II. The woman on the right is inputting ciphertext into an analog of the Japanese w:Type B Cipher Machine. The machine, or one like it, is on display at the w:National Cryptologic Museum, where it is identified as an improved version that was introduced in March 1944. See other photos in Category:PURPLE analog, improved (National Cryptologic Museum)".
Title: SIS women using Purple Analog
Credit: Washington Post, October 21, 2017
Author: US Army photographer
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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