Case file · 1990 · Codes & Puzzles
Kryptos
The Code in the CIA's Garden
A code in the CIA's courtyard. Its last 97 letters held out for 35 years.
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This 6 min episode was written from the public record. These are the sources behind it.
- CIA: "Kryptos" Sculpture (official account)
- CIA Museum: Kryptos (official artifact page)
- NSA: The CIA KRYPTOS Sculpture: A Summary of Previous Work and New Revelations (declassified NSA document, K1 to K3 solutions)
- RR Auction: The Complete Secrets of Kryptos: Jim Sanborn's Private Archive (2025 K4 solution auction)
- Wikipedia: Kryptos (overview)
Where a case is unresolved, the episode sets out what is known and what is disputed, and names no one as responsible beyond the official and court record. Corrections: support@realtimecomms.co.uk
