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Covert Timing Channel Analysis Either as Cyber Attacks or Confidential Applications

机译：隐式定时通道分析无论是网络攻击还是机密应用

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摘要

Covert timing channels are an important alternative for transmitting information in the world of the Internet of Things (IoT). In covert timing channels data are encoded in inter-arrival times between consecutive packets based on modifying the transmission time of legitimate traffic. Typically, the modification of time takes place by delaying the transmitted packets on the sender side. A key aspect in covert timing channels is to find the threshold of packet delay that can accurately distinguish covert traffic from legitimate traffic. Based on that we can assess the level of dangerous of security threats or the quality of transferred sensitive information secretly. In this paper, we study the inter-arrival time behavior of covert timing channels in two different network configurations based on statistical metrics, in addition we investigate the packet delaying threshold value. Our experiments show that the threshold is approximately equal to or greater than double the mean of legitimate inter-arrival times. In this case covert timing channels become detectable as strong anomalies.
机译：隐蔽的定时通道是在物联网（IoT）世界中传输信息的重要替代方法。在隐蔽定时信道中，基于修改合法流量的传输时间，在连续数据包之间的到达间隔时间内对数据进行编码。通常，时间的修改是通过在发送方延迟发送的数据包来进行的。隐蔽定时信道的关键方面是找到可以准确区分隐蔽流量和合法流量的数据包延迟阈值。在此基础上，我们可以秘密评估安全威胁的危险级别或敏感信息的传输质量。在本文中，我们基于统计指标研究了两种不同网络配置中隐蔽定时信道的到达时间间隔行为，此外，我们还研究了数据包延迟阈值。我们的实验表明，该阈值大约等于或大于合法到达间隔时间平均值的两倍。在这种情况下，隐蔽的定时通道可以检测为强异常。

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