Cryptex

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.

Source: wiktionary

With an embossed cover, vellum pages and brooding, mysterious artwork, this tome has a rich, premium feel. Careful readers can use the enclosed UV light and cryptex to reveal secrets that remain hidden from view.

Source: wiktionary

Earl Sweatshirt packs so much into his verses that listening to one can feel like trying to crack a cipher. “Nowhere2go,” a track from his upcoming album, is one such emotional cryptex; it’s powerfully blunt about being plagued by depression and seeing death everywhere, but decidedly oblique about what comes after.

Source: wiktionary

Waters provided a journal containing riddles, clues, a compass and cryptex, and the birthday girl and her best friend set out on a hunt to find a treasure, leading them to different places like the library, her church and a park.

Source: wiktionary