PURPLE

PURPLE.jpg

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

Tags

Citation

Japan, “PURPLE,” Ciphers and Encryption, accessed May 15, 2021, https://crypto.omeka.net/items/show/6.