esteganografía 15
From Greek steganos, hidden, covered, closed, opaque and graph, writing, written document. The science and the art of hiding information that has now evolved a lot with computers. Hidden messages always go on a carrier who could be a slave in classical Greece with letters printed on his head, a letter or a bit. They also have a code that needs to be decrypted. The codes of Julius Caesar in classical Rome altered the order of letters.