Realized binding user + computer + certificate to proving the status of object using certificate . user must login on the system from the computer which system specified and using he ' s certificate . realized the function which user can access the information all over the web server of government in a local area with one login at period of time . bring upped information access control method 即利用电子证书实现用户+电子证书+计算机三者绑定认证，用户必须在指定的计算机上通过口令验证，持与自己身份相符的电子证书进入系统，同时电子证书也只能在指定的计算机上使用；实现了区域内电子政务系统中用户单点登陆，跨网络访问信息的系统解决方案；提出应用中各政府机关对自己信息资源的控制方式，即通过建立区域内政府机关的单位编码和工作人员行政职务编码体系，并把用户的单位编码和行政职务编码作为用户访问和使用网络信息的控制信息。
During his over 30 years of excellent service to the university , professor mun performed various administrative duties and made remarkable contributions to the development of the university , and the faculty of business administration in particular . he was head of the department of business administration and department of marketing and international business , new asia college , and chairman of the board of studies in marketing and international business of the university 闵教授服务中文大学超过三十年，期间担任多项行政职务，包括新亚书院工商管理系系主任、新亚书院市场与国际企业系系主任、中文大学市场与国际企业学科委员会主席，并于一九八一至八四年及一九八七至九三年三度当选工商管理学院院长。
