Reliable Traffic Information Propagation in Vehicular Ad Hoc Networks

  • Park S
  • Zou C
  • Turgut D
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A vehicular ad hoc network (VANET) allows vehicles to share traffic
information and to alert each other of emergency events. To achieve this
goal, a security mechanism must be designed to guarantee that no
malicious vehicles can intercept, manipulate, or modify the traffic
information without being detected. In this chapter, we present two
novel approaches to provide reliable traffic information propagation in
a VANET: two-directional data verification, and time-based data
The two-directional data verification approach uses vehicles in both
driving directions of a two-way road as two separated media channels. A
traffic message will be transmitted through both channels. A recipient
vehicle verifies the message integrity by checking if data received from
both channels are matched. This approach exploits the fact that it is
difficult and costly to have two collaborative vehicles on both driving
directions in the same region. The time-based data verification approach
only uses vehicles in the opposite driving direction to propagate a
traffic message by first issuing its public key commitment and later
sending the actual traffic message. It relies on the time delay between
these two messages and the mobility of vehicles to protect data

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  • Soyoung Park

  • Cliff Zou

  • Damla Turgut

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