1. Solution goes on auction for CIA HQ’s Kryptos sculpture that has stumped code breakers for decades  CTV News
  2. CIA Kryptos Puzzle Creator Releases Final Clues  Scientific American
  3. Kryptos’ final code remains unsolved. The CIA sculpture’s creator is auctioning the solution  Washington Times
  4. CIA sculpture creator selling encryption key to K4 that has baffled cryptographers for 35 years  Yahoo