Cryptologic Bytes

"On This Date in History" Calendar

1929: Sec of War created the Signal Corps - Signals Intelligence Service.

Friday, April 5, 2019
1929: Sec of War created the Signal Corps - Signals Intelligence Service.

5 April 1929: The U.S. Secretary of War transferred cryptologic functions from the Military Intelligence Division to the Signal Corps - creating the Signals Intelligence Service (SIS) with William F. Friedman as its head. Friedman is pictured here with the SIS staff in 1935. This talented group ultimately broke the Japanese diplomatic machine cipher.

Join or renew a membership

Anyone, anywhere can be a member of the NCMF.

BECOME A FOUNDER

The Founders' Group spearheads the capital campaign to build the new Cyber Center for Education and Innovation - Home of the National Cryptologic Museum.

 

More Info »

Donate to the CCEI-NCM

Be a part of the future - help us build the Cyber Center for Education and Innovation - Home of the National Cryptologic Museum.

VISIT THE ARCHIVES

Check out the Cryptologic Bytes Archives for a wide variety of articles on all topics related to cryptology, codes and ciphers, related publications, Museums, and more.