In this paper, we propose a navigation scheme that
utilizes the online road information collected by a vehicular ad hoc
network (VANET) to guide the drivers to desired destinations in a
real-time and distributed manner. The proposed scheme has the
advantage of using real-time road conditions to compute a better
route and at the same time, the information source can be properly
authenticated. To protect the privacy of the drivers, the query
(destination) and the driver who issues the query are guaranteed to
be unlinkable to any party including the trusted authority. We make
use of the idea of anonymous credential to achieve this goal. In
addition to authentication and privacy preserving, our scheme
fulfills all other necessary security requirements. Using the real
maps of New York and California, we conducted a simulation study on
our scheme showing that it is effective in terms of processing delay
and providing routes of much shorter traveling time.
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