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Cryptologic History

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"On This Date in Cryptologic History" Calendar

1975: STONEHOUSE site officially closed.

Wednesday, March 4, 2026

4 March 1975: STONEHOUSE site officially closed. The signals collection site was located in Asmara, Ethiopia and closed prematurely due to civil war.

Learn more via the NSA.gov STONEHOUSE PDF - linked below.

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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.