Unverified50% confidenceFactExact time

Sigsaly was a top-secret transatlantic telephone line used between British Prime Minister Churchill and U.S. President Roosevelt during World War II for encrypted voice communication.

1

Sources

50%

Confidence

Long-term

Relevance

10/18/2026

First Seen

Sources

Sigsaly: The Top-Secret Hotline Between Churchill and Roosevelt

Related Entities

Sigsalyproduct Churchillperson Rooseveltperson

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