BOSTON (AP) — Secrets of the Kryptos sculpture at CIA HQ are selling for nearly $1 million! The auction, held Friday, offered exclusive documents related to the sculpture, made by artist Jim Sanborn in 1990. The winning bidder gets a one-on-one with Sanborn to discuss the encoded messages, including the elusive K-4 that frustrates even the best cryptographers. While three of the four messages (K1, K2, K3) have been solved, the K-4 remains a challenge, with many enthusiasts eager to crack it. Sanborn, who has been consulting on these codes for over two decades, hopes the buyer will keep the secrets alive and continue engaging with fans. The auction originally aimed to sell only K-4's secrets but expanded to include the entire archive after new clues were uncovered in the Smithsonian. This shows the lasting intrigue of both art and cryptography!