The CIA’s Infamous, Unsolved Cryptographic Puzzle Gets a ‘Final Clue’

"Even once it’s cracked, it’s gonna be a riddle, something that’s still controversial and hard to figure out," the creator of the Kryptos puzzle sculpture says.
Read more: https://www.vice.com/en_us/article/3a8k93/the-cias-infamous-unsolved-cryptographic-puzzle-gets-a-final-clue?source=Snapzu