ABSTRACT
This chapter proposes a lightweight privacy preserving solution aimed to achieve well-maintained balance between network performance and traffic privacy preservation. It focuses on the user traffic confidentiality issue and study the problem of traffic pattern concealment. The chapter presents the overall architecture for privacy preservation in wireless mesh networking. It discusses the collusion problem possible with malicious traffic observers and its impact on our proposed scheme. Traffic confidentiality prevents the traffic analysis attack from the mesh routers, which aims at deducing the traffic information such as who the user is communicating with and the amount and the pattern of traffic. The parameters that affect significantly our collusion analysis include the choice of cooperating observers and destination target node. In practice, the traffic analysis is conducted by dividing time into equal-sized sampling periods, then measuring the amount of traffic in each period, usually in terms of number of packets, assuming the packet sizes are all equal.
