In literature, the term "cryptogram" often embodies the spirit of intellectual challenge and mystery, inviting readers into a world where puzzles and codes play an integral role in unravelling hidden meanings. For instance, in Arthur Conan Doyle's "The Sign of the Four," the word is employed not merely as a simple riddle but as a metaphor for intricate, layered enigmas—problems that require both deep analytical thought and engaging perseverance to solve [1]. This literary use highlights how cryptograms can serve as a device to exemplify a character's wit and determination, drawing the reader into complex investigative adventures and embodying the allure of hidden truths waiting to be deciphered.