Solution of Periodic Polyalphabetic Systems

When standard alphabets are used with monoalphabetic systems, three approaches are possible. The simplest occurs when text can be immediately identified. Identification of only two or three letters in a standard unilateral alphabet is sufficient to reconstruct and confirm the entire alphabet. The other two methods, where text is not readily identifiable, are to match frequency patterns to the normal A through Z pattern and to generate all possible solutions. All three of these methods also apply to standard alphabet periodic polyalphabetics.