Active Eavesdropping via Spoofing Relay Attack

摘要

This paper studies a new active eavesdropping technique via the so-calledspoofing relay attack, which could be launched by the eavesdropper tosignificantly enhance the information leakage rate from the source overconventional passive eaves-dropping. With this attack, the eavesdropper acts asa relay to spoof the source to vary transmission rate in favor of itseavesdropping performance by either enhancing or degrading the effectivechannel of the legitimate link. The maxi-mum information leakage rateachievable by the eavesdropper and the corresponding optimal operation at thespoofing relay are obtained. It is shown that such a spoofing relay attackcould impose new challenges from a physical-layer security perspective since itleads to significantly higher information leakage rate than conventionalpassive eavesdropping.