基于delphi的MapX视图管理器 比较好的例子 MapXviewmanager-Based on the MapX View delphi management Comparison good example MapXviewmana ger

A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case.Polyalphabetic substitution