  A few years ago, Automotive area in the IoT was seen as theoretical concept
and today we are already seeing the possibilities of not only driverless cars,
but applications of IoT in the intelligent vehicles including parking,
maintaining environment, protecting lives and smoothing the flow vehicle
movements. We have realized the urgent need of using simple and efficient
secure protocol in Vehicular Ad Hoc Network (VANET) to be practical in the fast
mobility of the network nodes, and taking advantage of the existence of base
stations gateways along the road to inherit the protocol to different VANETs,
this will reduce the initialization of communication overhead time and the
security keys initialization each time a node passes to new base station zone.
In this research, we applied security protocol used in sensor networks to
achieve security in VANET, the simulation analysis shows that secure practical
communication is achieved which can be inherited to other sub VANETs. The
contribution of this article is enhancing proposed protocols with as less
cryptography computation overhead as possible to make it applicable in the high
mobility nature of VANET using security primitives; which guarantees security
while allowing fast authenticating during vehicle passing one VANET to the next
one depending on its direction in the transportation networks.
