中文摘要：

基于粗糙集理论对推理通道问题进行了研究。通过采用属性约简和属性值约简方法对数据库中的数据进行处理。在属性值约简基础之上,采用一种改进算法找出了数据库中推理规则集。进一步,将推理规则集中属性频率高的属性安全级别提高至决策属性的安全级别,从而消除推理通道。最后通过一个实例表明提出的消除通道算法是有效的。

英文摘要：

This paper addresses inference channel issue based on rough set theory.The data in database is processed by using attribute and attribute value reductions.Besides,based on attribute value reduction,an improved algorithm is proposed for finding the inference rules in database.Further,the security level of condition attributes which has high attribute frequency in inference rules is raised to the security level of decision attributes,therefore the inference channel could be eliminated.Finally,an example is used to show that the algorithm proposed in the paper is efficient and feasible.