网络安全分析案例-Network Security Analysis Case

该程序是Office2003的补丁。对于不同office下PPT难以打开的情况，该程序是个很好的解决办法。-that the procedure was Office2003 the patch. Different office under PPT it difficult to break the case, the procedure is a very good solution.

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