M-94
Dublin Core
Title
M-94
Subject
M-94
Description
The M-94 was a cipher device based off the polyalphabetic manual substitution cipher. It was created by US Army major Joseph Mauborgne in 1917 with inspiration from a similar device invented by Thomas Jefferson in 1795. In 1921, it was introduced to the Army.
This device consisted of 25 circular discs- each with a different mixed alphabet of 26 letters. Although the security of the pocket device wasn't impressive, companies like Doehler, Reeve, and Alcoa had produced 9,432 of these tools by 1943 for use in the US Army.
The growing obsolete nature of this cipher device would inspire the need for the M-209.
This device consisted of 25 circular discs- each with a different mixed alphabet of 26 letters. Although the security of the pocket device wasn't impressive, companies like Doehler, Reeve, and Alcoa had produced 9,432 of these tools by 1943 for use in the US Army.
The growing obsolete nature of this cipher device would inspire the need for the M-209.
Creator
Joseph O. Mauborgne
Source
https://www.campx.ca/crypto.html
Publisher
Cryptographic Artifacts
Date
1917-1943
Contributor
Richard Brisson
Format
.JPEG
Type
Cipher device
Still Image Item Type Metadata
Original Format
Cipher device
Collection
Citation
Joseph O. Mauborgne, “M-94,” Ciphers and Encryption, accessed April 26, 2024, https://crypto.omeka.net/items/show/30.