cryptex/ˈkɹɪptɛks/EtymologyBlend of cryptology + codex, coined in The Da Vinci Code (2003); see quotations.nounA puzzle box solved with a passcode.“Sophie was not surprised. Most of Leonardo’s unbuilt inventions had never been studied or even named. The term cryptex possibly had been her grandfather’s creation, an apt title for this device that used the science of cryptology to protect information written on the contained scroll or codex.”