BOSTON (AP) — The information needed to decipher the last remaining unsolved secret message embedded within a sculpture at CIA headquarters in Virginia sold at auction for nearly $1 million, the auction house announced Friday.

The winner will get a private meeting with the 80-year-old artist to go over the codes and charts in hopes of continuing what he’s been doing for decades: interacting with would-be cryptanalyst sleuths.

The archive owned by the artist who created Kryptos, Jim Sanborn, was sold to an anonymous bidder for $963,000, according to RR Auction of Boston. The archive includes documents and coding charts for the sculpture, dedicated in 1990.

Three of the messages on the 10-foot-tall sculpture — known as K1, K2 and K3 — have been solved, but a solution for the fourth, K-4

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