Welcome to the National Cryptologic Museum Foundation. The NCMF directly supports the National Cryptologic Museum (NCM), the first public museum in the U.S. Intelligence Community.

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1943: FRUPAC Intercepted Yamamoto's Encoded Itinerary.

Saturday, April 13, 2019
1943: FRUPAC Intercepted Yamamoto's Encoded Itinerary.

13 April 1943: FRUPAC intercepted encoded itinerary of Admiral Yamamoto's upcoming tour of the Solomon islands. OP-20-G, FRUPAC, and FRUMEL exchanged information to help decrypt the messages. This work enabled the shootdown of Admiral Yamamoto five days later. Photo: FRUPAC working on JN-25.

“On April 13, 1943, Allied radio intelligence intercepted a message carrying the travel itinerary of Admiral Yamamoto. The detail in the message listed flight and ground schedules and included what type of fighter escort would be provided. Major Red Lasswell of FRUPAC broke the coded message. The decision of what to do with the information was left to Admiral Nimitz. Nimitz consulted Layton as to what the ramifications would be if Yamamoto were removed. They considered that he might be replaced with a better commander, and Nimitz felt familiar with Yamamoto as his opponent. Layton felt nobody could adequately replace Yamamoto, and based on this opinion Nimitz gave Admiral Halsey the authority to carry out the intercept of Yamamoto’s aircraft. On 18 April, a flight of P-38 fighters with specially selected pilots and equipped with long-range fuel tanks shot down Yamamoto’s aircraft, killing one of Japan’s top naval leaders.” Ricky J. Nussio, in Sherman and Nimitz: Executing Modern Information Operations (2001)

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  • Government seizure of cryptologist Herbert Yardley's never-published book, "Japanese Diplomatic Secrets."

About Us

The NCMF directly supports the National Cryptologic Museum (NCM), the first public museum in the U.S. Intelligence Community. We think you will agree it is truly a "museum like no other."

Located adjacent to the National Security Agency (NSA) in Maryland, the NCM houses a priceless collection of artifacts that represent our Nation's history in code making and code breaking, as well as a world class library of cryptologic media. The NCMF acquires the best artifacts for the NCM and supports new educational and interactive exhibits.

The NCMF provides exceptional cryptologic programs throughout the year, encourages young minds to explore cryptology and innovation through valued awards, and hosts educational, cryptology-related exhibits at various community events.

As part of the Foundation's partnership with NSA to build the Cyber Center for Education and Innovation - Home of the National Cryptologic Museum (CCEI-NCM), the NCMF also serves as a leader in the field of cybersecurity - striving to provide the best in educational resources and programs.

The NCMF and NCM share a joint three-fold mission to Educate, Stimulate, and Commemorate. Learn more about our MISSION.