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Solution goes on auction for CIA HQ’s ‘Kryptos’ sculpture that has stumped code breakers for decades

Jim Sanborn, 79, is auctioning the Kryptos archive including the unsolved fourth message, with bids topping $201,841, to appoint a new keeper of the secret.

  • Boston-Based RR Auction launched the sale last month, running through Nov. 20 with the top bid at $201,841 for the Kryptos archive.
  • Jim Sanborn, artist, age 79, has had health scares in recent years and is auctioning the K4 solution after charging $50 per submission due to persistent public interest.
  • Photos taken at the Smithsonian revealed Sanborn's original scrambled texts, shocking him to seal his papers for 50 years while RR Auction threatened legal action against Kobek and Byrne.
  • The auction winner will receive the complete archive including everything needed to solve K4 and the alternate paragraph K5, while Sanborn sealed his papers for 50 years.
  • K4 has continued to baffle cryptographers as it has stumped professional cryptologists and amateur codebreakers for decades, while Sanborn insists only he holds the unique decoding method and many enthusiasts want K4 kept secret.
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Solution goes on auction for CIA HQ's 'Kryptos' sculpture that has stumped code breakers for decades

An artist is auctioning off his archive for a sculpture at CIA headquarters that has transfixed code breakers for decades.

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MY Northwest broke the news in Tacoma, United States on Wednesday, November 12, 2025.
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