CA系统中基于用户分组的EMM分发机制宰·实用-CA system, the EMM based on user group slaughtered utility distribution mechanism

It is encryption and decryption utility hich Works according to the "key" you choose. Once you Encrypted the Message you can send it to your friends, classmates to which you can give the key. And on their side they can Decrypt the message by the key

This little utility implements the Base64 Content-Transfer-Encoding standard described in RFC1113 (http://www.faqs.org/rfcs/rfc1113.html).

Lempel–Ziv–Welch (LZW) is a universal lossless data compression algorithm created by Abraham Lempel, Jacob Ziv, and Terry Welch. It was published by Welch in 1984 as an improved implementation of the LZ78 algorithm published by Lempel and Ziv in 1978