Kryptos K4 Decoded: Final Passage of CIA Sculpture Solved After 30 Years

After decades of speculation, the final passage (K4) of Jim Sanborn’s Kryptos sculpture at CIA headquarters has been fully decrypted.

The solution: • Is deterministic and reproducible • Includes both confirmed keywords ("BERLIN" and "CLOCK") • Uses a transformation aligned with the physical design of the sculpture • Is structured and published with timestamped attribution

Includes an open letter to Sanborn and a breakdown of why this solution fits both the cipher and the art.

Awesome!

I would pay for a layman’s book that explained how all 4 parts were solved.