In addition to explain the history of the same and the algorithms of replacement employees to achieve the confusion, and permutation or transposition for the dissemination; We explain how they are classified the different types of algorithms classical and modern figure: by substitution monoalphabetic o polyalphabetic, and figure monogramica o poligramica.
Aidha kueleza historia ya sawa na algorithms ya badala wafanyakazi kufikia mkanganyiko, na permutation au transposition kwa ajili ya usambazaji; Tutaeleza jinsi ni classified ya aina tofauti ya algorithms Kielelezo classical na kisasa: na Ubadilishani monoalphabetic Ee polyalphabetic, na Kielelezo monogramica Ee poligramica.