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Many anonymous communication solutions have been proposed to provide anonymous Mobile Ad hoc NETwork (MANET) communications. However, they mainly focus on the routing layer and above to hide the end-to-end traffic patterns. The point-to-point communication relations are often considered as non-critical information in terms of anonymity, which actually exposes the traffic patterns on the PHY/MAC layer. Adversaries may utilize the MAC layer protocol to derive the end-to-end communication relations by using statistical traffic analysis. Unfortunately, the most popular wireless MAC protocol used in MANETs, i.e., IEEE 802.11, will reveal the point-to-point communication relations to attackers.
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