Event Brief
Dec 10, 2025 at 5:04 PM ET
GCHQ Christmas Card Code-Cracking Challenge
By The BriefBrief
Participate in a quiz set by the UK's intelligence agency.
WHO: GCHQ
WHAT: Christmas card code-cracking challenge
WHEN: Dec 9, 2025 at 7:00 PM ET
WHERE: United Kingdom
WHY: To engage the public in code-breaking activities
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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Same format. Every time.
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