. In this thesis,On the basis of Internct network security risk analysis,theillmnination of a variety of network illegal attacks and attacks techniques,platform forchess/card games’security risk analysis and the research of the user data protection,virtual property protection,anti—plug-in game technology and group confrontationproblem,An security evaluation model of Platform for chess/card games is constructedand proposed.This model establishes a comprehensive evaluation system derived fromhierarchical analysis methods. This thesis analyzes the general architecture and key technologies of platform forchess/card games online:EPOLL mechanism,multi-threading technology,informationprocessing mechanism,the database’S visit to keep technology and client enginedevelping technology.On the basis of the ORranos’design goal and needs analysis,thethesis designes OUl’anOS’client and server-side,puts forward Ouranos security solutionsfrom the point of view of the server security,data exchange security,user informationand property protection and anti-plug-in technology,and elaborates the“rd—partyinterface and the game flow of platform. Finally,this thesis summarizes the characteristics and safety of Ouranos,andmakes a comparative analysis between Ouranos and others.Key words:platform for chess/card games,server architecture,the evaluation system,network security,online games Ⅱ 缩略词表 缩略词表 Abbreviation缩略词 英文全称 中文全称WS 黝Server W曲服务器US Update Server 更新服务器DS Download Server 下载服务器GTS Gateway Server 网关服务器SAS Security Authentication Server 安全认证服务器LS Login Server 登陆服务器HS Hall Server 大厅服务器GSS Game Servers 具体游戏服务器FCS Friend Center Server 玩家中央服务器DCS Dir Center Server 游戏目录中央服务器MDS Main Dir Server 主目录服务器MFS Main Friend Server 主玩家服务器LocalDB Local