Cryptologic History

"On This Date in Cryptologic History" Calendar

1975: National Security Council Seeks Secure Voice Network

Saturday, May 23, 2026

23 May 1975: The National Security Council requested a plan for implementation of Washington Protected Communications Zone and Executive Secure Voice Network in response to the Soviet intercept threat.

Learn About the Pioneers

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