M-94

M94.jpg

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.

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

Tags

Citation

Joseph O. Mauborgne, “M-94,” Ciphers and Encryption, accessed April 14, 2021, https://crypto.omeka.net/items/show/30.