unicity distance References unicity distance cryptography Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Vigenère cipher…this point is called the unicity distance—and is only about 25 symbols, on average, for simple substitution ciphers. See also Vernam-Vigenère cipher. Read More…this point is called the unicity distance—and is only about 25 symbols, on average, for simple substitution ciphers. See also Vernam-Vigenère cipher. Read More