The cryptex is fictional, but in the book The DaVinci Code, yes I believe that he was the one that supposedly created it.

Cryptex

Like, for example, "Slay It" by Cryptex. Something that really goes well with a fight or battle scene, like some kind of future space warrior.

In The Da Vinci Code, Robert Langdon realized the Fibonacci sequence was the key to solving the cryptex puzzle by recognizing the sequence in the numbers on the Vitruvian Man painting. He used the Fibonacci sequence to determine the correct order of the letters in the password.

1. One-Handed Bottle Opener

2. Shark Comb

3. Earbud Case

4. Gearbox Keychain

5. AA to C Battery Adapter

6. Cable Holder (or Cable Clip)

7. Shower Head

8. Wall Outlet Shelf

9. Cable Management Hive

10. Monster Mouth Headphone Holder

11. Caffeine Molecule Drinks Coaster

12. Swiss Army Style Key Chain

13. iPhone 6S Charging Dock & Passive Amplifier

14. Collapsible Coffee Sleeve

15. USB Drive Cryptex