适应性随机延迟的网络隐蔽时间信道干扰方法

An Adaptive Random Delay Based Approach to Mitigating Network Covert Timing Channel

在网络隐蔽时间信道中,数据包的发送或到达时间被操控以携带消息而达到隐蔽传送信息的目的。这种信道的存在会对信息私密性带来危害,因此应该被干扰或加以限制。因为网络隐蔽时间信道寄生于正常通信信道,对它的干扰不可避免会对正常网络通信带来负面影响。论文提出了如何在多重限制条件下对网络隐蔽时间信道进行干扰的问题,并针对这一问题给出了基于适应性随机延迟的解决方案。

A network covert timing channel（NCTC） is one that uses the timing of packets to transmit information between networks in a stealthy way. NCTC poses a threat to confidentiality and needs to be mitigated in high-level trustworthy networks. Since NCTC resides in normal channels, any mitigation strategy against it would negatively affect the network performance. In this paper, the problem of mitigating NCTC under combined, reasonablet and practical constraints is proposed, and an approach based on adaptive random delay is given.