文档介绍：— 9—附件 2 信息系统安全保护等级定级指南(试用稿) 公安部二〇〇五年十二月— 10—目次 1 范围........................................................................................................................................................... 11 2 术语和定义.............................................................................................................................................. 11 业务信息( Business Information ) ............................................................................................ 11 业务信息安全性( Security of Business Information ) ............................................................. 11 业务服务保证性( Assurance of Business Service ) ................................................................ 11 信息系统( Information System ) .............................................................................................. 11 业务子系统( Business Subsystem ) ......................................................................................... 11 3 定级对象.................................................................................................................................................. 11 信息系统的划分.......................................................................................................................... 12 信息系统和业务子系统.............................................................................................................. 12 4 决定信息系统安全保护等级的要素...................................................................................................... 12 决定信息系统重要性的要素...................................................................................................... 13 定级要素赋值.............................................................................................................................. 13 5 确定信息系统安全保护等级的步骤...................................................................................................... 15 6 信息系统安全保护等级的确定方法.................................................................................