18-06-2012, 04:20 PM
PPGCV: Privacy Preserving Group Communications
Protocol for Vehicular Ad Hoc Networks
Privacy PreservingGroupCommunicatinsProtocol.pdf (Size: 144.54 KB / Downloads: 58)
Abstract
Vehicular communications (VC) have many applications
with multicast nature such as cooperative driving and
platooning. The multicast nature implies that secure group communication
is important to guarantee the security in vehicular
networks.
INTRODUCTION
Vehicular networks are considered instance of the ad hoc
networks, which are designed primarily to increase the safety
on roads. According to the Dedicated Short Range Communications
(DSRC) specifications [1] for safety-related applications,
each vehicle will periodically broadcast messages about
the road conditions. Those messages are not intended to a
specific vehicle, but they are multicasted to the neighborhood
of the transmitting vehicle. In such situation, group communications
may be necessary to secure the communications
between those vehicles. In addition, many applications such
as cooperative driving and platooning are in need of group
communications to ensure a robust security service.
RELATED WORK
A few proposals in the literature addressed the problem
of group key update in ad hoc networks. Kaya et al. [10]
adopted the Public Key Infrastructure (PKI) to establish group
communications. In that protocol, every node possesses a
unique certificate, which is used for authentication. The GPS
location information of the nodes is used to connect new nodes
to the physically closest node. In this way, the communication
cost is reduced by localizing the group operation. The main
drawback of this protocol is the increased computation cost
because at each hop the message has to be decrypted and reencrypted
before forwarding it to the next hop. In [11].
CONCLUSION
We have proposed PPGCV protocol for secure group communications
in vehicular networks. The PPGCV inherits the
scalability, efficiency, and node mobility consideration from
the GKMPAN protocol. In addition, the proposed protocol
achieves privacy preservation of the users by adopting a probabilistic
approach. Furthermore, PPGCV protocol provides
conditional full statelessness property by relying on a security
threshold scheme. Extensive analysis and evaluation of the
PPGCV protocol have been performed to demonstrate its
reliability and security.