摘要： 提出基于同关证检查技术的信息出关控制模型。该模型强调信，包从内部网流出到外部网时，必须经过网关的检查。首先，所有出关的信息必须带有内部网签发的出关证；其次，出关的信息必须经过密级检查，只有符合出关密级控制规则的信息才能出关。

关键词: 信息安全, 出关控制, 密级管理

Abstract: Passport based outgoing Message checking model is described in this paper. Message transmitted form Intranet to Internet ischecked by a gateway at the interface between Internet and Intranet in the model. First, outgoing message will be refused by the gatewaywhile it has not been allowed to output to Internet (described in passport); second, if the message is important, it must be encrypted beforebeing transmitted. Thus, the outgoing message keeps under controlled.

中图分类号: 

• TP393.0