Peer Reviewed Journal via three different mandatory reviewing processes, since 2006, and, from September 2020, a fourth mandatory peer-editing has been added.
Unlike fixed or wired networks, mobile ad-hoc networks pose a
number of challenges for peer-to-peer communication due to their
dynamic nature. This paper presents a novel framework for vehicleto-
vehicle communication controlled and facilitated by a group
leader within a group of vehicles. A communication model for a
pure ad-hoc network is developed with much concern about the
privacy and security of the system, for the ease of effective
communication between vehicles with a reduced communication
and computational overhead when no fixed infrastructure is present
in the roadsides. In the proposed protocol, vehicles within a radio
frequency form a group. They elect their leader based on some
criteria who is then responsible for generating a group public and
private key pair. Each vehicle is equipped with a tamper resistant
OBU which is capable of generating public/private keys pairs and
also self-certifies the generated keys based on one way hash
chaining technique. Any vehicle joins the group communicates the
group leader, authenticates itself to obtain the group key. Later, the
vehicle uses the group key to send traffic related messages to the
group leader who is responsible for batch verifying the authenticity
of the message from different sources and one hop broadcast them
to reduce the computation overhead on message verification in each
vehicle. In addition, our scheme adopts the k-anonymity approach
to protect user identity privacy, where an attacker cannot associate a
message with the sending vehicle. Extensive analysis and
simulations show that the proposed architecture provides an
efficient and fully self organized system management for car-to-car
communication without the need of any external infrastructure.
