An anonymous buyer paid $962,500 at an RR Auction sale for the code to the final unsolved passage of Jim Sanborn's sculpture "Kryptos," located at the CIA headquarters in Langley, Virginia. The sculpture, dedicated in 1990, contains four encrypted passages; three have been cracked by cryptologists, but the 97-character fourth passage (K4) has remained unsolved for decades. Sanborn, now 80, decided to sell the solution after growing tired of fielding inquiries from enthusiasts, despite a recent discovery of the solution in the Smithsonian's Archives of American Art that raised questions about the auction.
The sale matters because it marks a rare instance where an artwork's hidden intellectual property—its cryptographic key—was sold as a commodity, blurring lines between art, puzzle, and collectible. The transaction also highlights the enduring mystique of "Kryptos," which has captivated amateur and professional codebreakers worldwide, and raises questions about the future of the secret: the anonymous buyer now controls the key to one of the most famous unsolved codes in modern art history.