The technology of Covert Channel is often used for communications between computers and the Internet with high sensitivity or security levels.Presently,some research were carried out on covert channel using computer s...The technology of Covert Channel is often used for communications between computers and the Internet with high sensitivity or security levels.Presently,some research were carried out on covert channel using computer screen light radiation,speakers,electromagnetic leakage,etc.In this paper,the technology of SoundHammer is studied.It is a technical bridgeware that use acoustic waves to transmit data from sound device into an air-gapped network.Firstly,an idea was proposed for data transmission by covert channel through acoustic waves.Then,this method was validated by experiment and the risks of the air-gapped network were confirmed.Finally,some countermeasures for detecting and eliminating such covert channels were listed.展开更多
基金through grants from the National Natural Science Foundation of China(No.61602491)the University fund of National University of Defense Technology(No.KY19A013)We also would like to thank the Institute of Psychology,Chinese Academy of Sciences for generously supporting our research.
文摘The technology of Covert Channel is often used for communications between computers and the Internet with high sensitivity or security levels.Presently,some research were carried out on covert channel using computer screen light radiation,speakers,electromagnetic leakage,etc.In this paper,the technology of SoundHammer is studied.It is a technical bridgeware that use acoustic waves to transmit data from sound device into an air-gapped network.Firstly,an idea was proposed for data transmission by covert channel through acoustic waves.Then,this method was validated by experiment and the risks of the air-gapped network were confirmed.Finally,some countermeasures for detecting and eliminating such covert channels were listed.
