The CIA’s Kryptos sculpture, a cryptographic art piece installed at its headquarters 35 years ago, is set to be auctioned after its creator reveals the solution to its final encrypted panel. Intelligence analysts have successfully decoded three of the four panels, leaving the last one as the last unsolved mystery. The sculpture, which has remained a enigma to the public and cryptographers since its installation, has now entered the auction market, sparking intrigue among both collectors and experts.