本次毕业设计基于Eclipse平台，用JAVA编程设计出一个基于信息内容加密的局域网聊天工具，实现了用户的注册、登录和聊天等功能，并且对用户信息和聊天内容进行加密处理，保证了信息的安全性。-The school design is based on Eclipse platform to design a program using JAVA-based content encryption LAN chat tools, implements the user registration, login and chat functions, and user information and chat on the encrypted content to ensure that the information security.