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flag Artist Jim Sanborn is auctioning the K4 solution to the CIA's Kryptos puzzle, seeking a new guardian due to health issues.

flag Artist Jim Sanborn is auctioning the solution to the unsolved K4 section of the Kryptos sculpture at CIA headquarters, a decades-old puzzle that has challenged cryptographers since its 1990 installation. flag The auction, managed by RR Auction through November 20, includes the full archive—original coding charts, scrambled texts, and an alternate passage K5—with the top bid reaching $201,841. flag Sanborn, 79, citing health issues, seeks a new custodian to preserve the mystery. flag The sale followed the discovery of original scrambled texts in a Smithsonian archive, prompting concerns over transparency, though Sanborn maintains only he holds the decryption method. flag The sculpture, known for its S-shaped copper screen and encrypted messages, remains one of the world’s most enduring art and code mysteries.

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