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Cryptologic History

Every little bit helps the NCF to influence the cryptologic future by sharing our educational resources, stimulating new knowledge, and commemorating our heritage.

"On This Date in Cryptologic History" Calendar

1881: First telephone ciphony device invented by James Harris Rodgers.

Saturday, December 20, 2025

20 Dec 1881: First telephone ciphony device invented by James Harris Rodgers, chief electrician of the U.S. Capitol.

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Learn About the Pioneers

Learn about the various individuals and groups who paved the way in the field of cryptology, cyber, computers, and more.