【摘要】 介绍了 Red Hat L inux环境下的目录结构隐通道 ,对该隐通道的理论带宽进行了计算 ,并对串行聚合隐通道的带宽进行了测试 .测试结果表明聚合隐通道造成的信息泄露更为严重 ,对此不可忽视更多还原

【Abstract】 Covert channel is a hidden security trouble in a computer system . In RedHat Linux ,we find one sort of covert channel : Upgraded directory covert channel . We compute the bandwidth of this covert channel and test the bandwidth of the aggregation of this covert channel . The testing result shows that the aggregation of this covert channel will more heavily compromise the security of the system . We should pay more attention to the aggregation of covert channel .更多还原