PURPLE
Dublin Core
Title
PURPLE
Subject
Japanese Purple cipher
Description
PURPLE was a Japanese cipher machine used during WWII and based off the Enigma's rotor technology. While it was developed in 1937 with four rotors (compared to the Enigma's three), it was broken only a few years later in 1940 without being seen by the successful cryptanalysts. William Friedman and the U.S. Signal Intelligence Service did this by building a working replica of the highest Japanese security code.
Creator
Japan
Source
https://ciphermachines.com/purple
Publisher
Ciphermachines
Date
1937
Contributor
Ciphermachines
Relation
https://crypto.omeka.net/items/show/5
Format
.JPEG
Language
English
Type
Cypher Machine
Still Image Item Type Metadata
Original Format
Cypher Machine
Collection
Citation
Japan, “PURPLE,” Ciphers and Encryption, accessed April 26, 2024, https://crypto.omeka.net/items/show/6.