Abstract — The privacy of wireless communications is becoming an important issue due to the open nature of wireless medium. Many works have been proposed to address the privacy of communicating parties, the privacy of source and destionation’s current positions and the privacy of routes. However, with the advent of new radio identification and localization techniques, more advanced privacy attacks are possible. We describe a new privacy attack in which the adversary tries to infer the itineraries of the node and we design an algorithm that protects the itinerary privacy by camouflaging the nodes ’ movements. Based on the motion pseudonyms generated from unique camouflaging movements, we propose an anonymous routing scheme that protects the privacy of communicating parties and route privacy without using cryptography. Itinerary privacy and other privacy goals are closely related so we combine camouflaging movements and our anonymous routing scheme as a comprehensive privacy solution for MANET wireless communications. Our analysis results show that our mobility confusion algorithm is cost-effective, which decreases itinerary exposure probability more than 50 % at a cost of less than 3 % extra travelling distance. And our simulation results show that using our mobility camouflaging algorithm does not diminish network layer performance in terms of message delivery ratio, delay and message overhead. Index Terms — privacy, security, mobile ad-adhoc networks. I
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