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The written word is considered humanity's most significant invention, leading to the dual need to share and conceal information. This necessity birthed cryptography, derived from the Greek term meaning "hidden writing." Early examples date back to ancient Greece, where Herodotus described a method of concealing a message on a wooden board covered with wax during the 5th century BC, used to communicate military matters. This method, known as steganography (covered writing), was prevalent throughout the ancient world, from Greece to China. However, its vulnerability—once discovered, the message could easily be revealed—prompted the development of cryptography, which offered a more secure form of information concealment.
