Java Applet与Java Servlet的安全通信策略与实现-Java Applet with the Java Servlet secure communications strategy and implementation

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

two layer encryption (TLE) is a network security protocol for secure the communication