Cryptex (Eng. Cryptex) is a cylinder consisting of rotating disks with letters. By arranging the letters in a specific order, the cryptex could be opened to extract the secret message from the center of the cylinder. When attempting to hack the cryptographic device, the vial containing vinegar inside would break, and the acid would destroy the paper. The cryptex was recreated in the movie 'The Da Vinci Code' based on the drawings of Leonardo Da Vinci.