Topic summary
Cryptex
Extracted from the Wikipedia article The Da Vinci Code.
Plot
Neveu and Langdon escape from the police and visit the bank. In the safe deposit box, which is unlocked with the Fibonacci sequence, they find a box containing the keystone: a cryptex, a cylindrical, hand-held vault with five concentric, rotating dials labeled with letters. When they are lined up correctly, they unlock the device, but if the cryptex is forced open, an enclosed vial of vinegar breaks and dissolves the message inside the cryptex, which was written on papyrus. The box containing the cryptex contains clues to its password.