Browse Items (14 total)

NESTOR is the NSA-developed speech encryption used by American forces during the Vietnamese War. The encryption was compatible between several devices, including the KY-38 manpack unit, KY-8 vehicular unit, and KY-28 aircraft unit.

SIGABA was an electro-mechanical cipher machine created in the late 1930s by the US Army and Navy. It was considered an impressive cryptomachine in that time period to the degree that it was used throughout WWII and into the 1950s.

By the end of…

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 M-209 was a cipher machine invented by Boris Hagelin or AB Cryptoteknik at the beginning of WWII. As a pin-and-lug cipher machine, it did not require electricity. During the war, German cryptanalysts called the machine "AM-1" for "American…